﻿/*!
 * FullCalendar v2.1.0
 * Docs & License: http://arshaw.com/fullcalendar/
 * (c) 2013 Adam Shaw
 */

/*!
 * FullCalendar v2.1.0
 * Docs & License: http://arshaw.com/fullcalendar/
 * (c) 2013 Adam Shaw
 */


import moment from 'moment';

    var defaults = {
        firstLoading: true,
        lang: 'en',

        defaultTimedEventDuration: '02:00:00',
        defaultAllDayEventDuration: { days: 1 },
        forceEventDuration: false,
        nextDayThreshold: '09:00:00', // 9am

        // display
        defaultView: 'month',
        aspectRatio: 1.35,
        header: {
            left: 'title',
            center: '',
            right: 'today prev,next'
        },
        weekends: true,
        weekNumbers: false,

        weekNumberTitle: 'W',
        weekNumberCalculation: 'local',

        //editable: false,

        // event ajax
        lazyFetching: true,
        startParam: 'start',
        endParam: 'end',
        timezoneParam: 'timezone',

        timezone: false,

        //allDayDefault: undefined,

        // time formats
        titleFormat: {
            month: 'MMMM YYYY', // like "September 1986". each language will override this
            week: 'll', // like "Sep 4 1986"
            day: 'LL' // like "September 4 1986"
        },
        columnFormat: {
            month: 'ddd', // like "Sat"
            week: generateWeekColumnFormat,
            day: 'dddd' // like "Saturday"
        },
        timeFormat: { // for event elements
            'default': generateShortTimeFormat
        },

        displayEventEnd: {
            month: false,
            basicWeek: false,
            'default': true
        },

        // locale
        isRTL: false,
        defaultButtonText: {
            prev: "prev",
            next: "next",
            prevYear: "prev year",
            nextYear: "next year",
            today: 'Today',
            month: 'M',
            week: 'W',
            day: 'D'
        },

        buttonIcons: {
            prev: 'left-single-arrow',
            next: 'right-single-arrow',
            prevYear: 'left-double-arrow',
            nextYear: 'right-double-arrow'
        },

        // jquery-ui theming
        theme: false,
        themeButtonIcons: {
            prev: 'circle-triangle-w',
            next: 'circle-triangle-e',
            prevYear: 'seek-prev',
            nextYear: 'seek-next'
        },

        dragOpacity: .75,
        dragRevertDuration: 500,
        dragScroll: true,

        //selectable: false,
        unselectAuto: true,

        dropAccept: '*',

        eventLimit: false,
        eventLimitText: 'more',
        eventLimitClick: 'popover',
        dayPopoverFormat: 'LL',

        handleWindowResize: true,
        windowResizeDelay: 200 // milliseconds before a rerender happens

    };


    function generateShortTimeFormat(options, langData) {
        return langData.longDateFormat('LT')
		.replace(':mm', '(:mm)')
		.replace(/(\Wmm)$/, '($1)') // like above, but for foreign langs
		.replace(/\s*a$/i, 't'); // convert to AM/PM/am/pm to lowercase one-letter. remove any spaces beforehand
    }


    function generateWeekColumnFormat(options, langData) {
        var format = langData.longDateFormat('L'); // for the format like "MM/DD/YYYY"
        format = format.replace(/^Y+[^\w\s]*|[^\w\s]*Y+$/g, ''); // strip the year off the edge, as well as other misc non-whitespace chars
        if (options.isRTL) {
            format += ' ddd'; // for RTL, add day-of-week to end
        }
        else {
            format = 'ddd ' + format; // for LTR, add day-of-week to beginning
        }
        return format;
    }


    var langOptionHash = {
        en: {
            columnFormat: {
                week: 'ddd M/D' // override for english. different from the generated default, which is MM/DD
            },
            dayPopoverFormat: 'dddd, MMMM D'
        }
    };


    // right-to-left defaults
    var rtlDefaults = {
        header: {
            left: 'next,prev today',
            center: '',
            right: 'title'
        },
        buttonIcons: {
            prev: 'right-single-arrow',
            next: 'left-single-arrow',
            prevYear: 'right-double-arrow',
            nextYear: 'left-double-arrow'
        },
        themeButtonIcons: {
            prev: 'circle-triangle-e',
            next: 'circle-triangle-w',
            nextYear: 'seek-prev',
            prevYear: 'seek-next'
        }
    };

    ; ;

    var fc = $.fullCalendar = { version: "2.1.0" };
    var fcViews = fc.views = {};


    $.fn.fullCalendar = function (options) {
        var args = Array.prototype.slice.call(arguments, 1); // for a possible method call
        var res = this; // what this function will return (this jQuery object by default)

        this.each(function (i, _element) { // loop each DOM element involved
            var element = $(_element);
            var calendar = element.data('fullCalendar'); // get the existing calendar object (if any)
            var singleRes; // the returned value of this single method call

            // a method call
            if (typeof options === 'string') {
                if (calendar && $.isFunction(calendar[options])) {
                    singleRes = calendar[options].apply(calendar, args);
                    if (!i) {
                        res = singleRes; // record the first method call result
                    }
                    if (options === 'destroy') { // for the destroy method, must remove Calendar object data
                        element.removeData('fullCalendar');
                    }
                }
            }
            // a new calendar initialization
            else if (!calendar) { // don't initialize twice
                calendar = new Calendar(element, options);
                element.data('fullCalendar', calendar);
                calendar.render();
            }
        });

        return res;
    };


    // function for adding/overriding defaults
    function setDefaults(d) {
        mergeOptions(defaults, d);
    }


    // Recursively combines option hash-objects.
    // Better than `$.extend(true, ...)` because arrays are not traversed/copied.
    //
    // called like:
    //     mergeOptions(target, obj1, obj2, ...)
    //
    function mergeOptions(target) {

        function mergeIntoTarget(name, value) {
            if ($.isPlainObject(value) && $.isPlainObject(target[name]) && !isForcedAtomicOption(name)) {
                // merge into a new object to avoid destruction
                target[name] = mergeOptions({}, target[name], value); // combine. `value` object takes precedence
            }
            else if (value !== undefined) { // only use values that are set and not undefined
                target[name] = value;
            }
        }

        for (var i = 1; i < arguments.length; i++) {
            $.each(arguments[i], mergeIntoTarget);
        }

        return target;
    }


    // overcome sucky view-option-hash and option-merging behavior messing with options it shouldn't
    function isForcedAtomicOption(name) {
        // Any option that ends in "Time" or "Duration" is probably a Duration,
        // and these will commonly be specified as plain objects, which we don't want to mess up.
        return /(Time|Duration)$/.test(name);
    }
    // FIX: find a different solution for view-option-hashes and have a whitelist
    // for options that can be recursively merged.

    ; ;

    //var langOptionHash = {}; // initialized in defaults.js
    fc.langs = langOptionHash; // expose


    // Initialize jQuery UI Datepicker translations while using some of the translations
    // for our own purposes. Will set this as the default language for datepicker.
    // Called from a translation file.
    fc.datepickerLang = function (langCode, datepickerLangCode, options) {
        var langOptions = langOptionHash[langCode];

        // initialize FullCalendar's lang hash for this language
        if (!langOptions) {
            langOptions = langOptionHash[langCode] = {};
        }

        // merge certain Datepicker options into FullCalendar's options
        mergeOptions(langOptions, {
            isRTL: options.isRTL,
            weekNumberTitle: options.weekHeader,
            titleFormat: {
                month: options.showMonthAfterYear ?
				'YYYY[' + options.yearSuffix + '] MMMM' :
				'MMMM YYYY[' + options.yearSuffix + ']'
            },
            defaultButtonText: {
                // the translations sometimes wrongly contain HTML entities
                prev: stripHtmlEntities(options.prevText),
                next: stripHtmlEntities(options.nextText),
                today: stripHtmlEntities(options.currentText)
            }
        });

        // is jQuery UI Datepicker is on the page?
        if ($.datepicker) {

            // Register the language data.
            // FullCalendar and MomentJS use language codes like "pt-br" but Datepicker
            // does it like "pt-BR" or if it doesn't have the language, maybe just "pt".
            // Make an alias so the language can be referenced either way.
            $.datepicker.regional[datepickerLangCode] =
			$.datepicker.regional[langCode] = // alias
				options;

            // Alias 'en' to the default language data. Do this every time.
            $.datepicker.regional.en = $.datepicker.regional[''];

            // Set as Datepicker's global defaults.
            $.datepicker.setDefaults(options);
        }
    };


    // Sets FullCalendar-specific translations. Also sets the language as the global default.
    // Called from a translation file.
    fc.lang = function (langCode, options) {
        var langOptions;

        if (options) {
            langOptions = langOptionHash[langCode];

            // initialize the hash for this language
            if (!langOptions) {
                langOptions = langOptionHash[langCode] = {};
            }

            mergeOptions(langOptions, options || {});
        }

        // set it as the default language for FullCalendar
        defaults.lang = langCode;
    };
    ; ;


    function Calendar(element, instanceOptions) {
        var t = this;



        // Build options object
        // -----------------------------------------------------------------------------------
        // Precedence (lowest to highest): defaults, rtlDefaults, langOptions, instanceOptions

        instanceOptions = instanceOptions || {};

        var options = mergeOptions({}, defaults, instanceOptions);
        var langOptions;

        // determine language options
        if (options.lang in langOptionHash) {
            langOptions = langOptionHash[options.lang];
        }
        else {
            langOptions = langOptionHash[defaults.lang];
        }

        if (langOptions) { // if language options exist, rebuild...
            options = mergeOptions({}, defaults, langOptions, instanceOptions);
        }

        if (options.isRTL) { // is isRTL, rebuild...
            options = mergeOptions({}, defaults, rtlDefaults, langOptions || {}, instanceOptions);
        }



        // Exports
        // -----------------------------------------------------------------------------------

        t.options = options;
        t.render = render;
        t.destroy = destroy;
        t.refetchEvents = refetchEvents;
        t.reportEvents = reportEvents;
        t.reportEventChange = reportEventChange;
        t.rerenderEvents = renderEvents; // `renderEvents` serves as a rerender. an API method
        t.changeView = changeView;
        t.select = select;
        t.unselect = unselect;
        t.prev = prev;
        t.next = next;
        t.prevYear = prevYear;
        t.nextYear = nextYear;
        t.today = today;
        t.gotoDate = gotoDate;
        t.incrementDate = incrementDate;
        t.zoomTo = zoomTo;
        t.getDate = getDate;
        t.getCalendar = getCalendar;
        t.getView = getView;
        t.option = option;
        t.trigger = trigger;
        t.exit = exit;

        // 单页应用bug，防止第二次不加载
        function exit() {
            defaults.firstLoading = true;
        }

        // Language-data Internals
        // -----------------------------------------------------------------------------------
        // Apply overrides to the current language's data


        // Returns moment's internal locale data. If doesn't exist, returns English.
        // Works with moment-pre-2.8
        function getLocaleData(langCode) {
            var f = moment.localeData || moment.langData;
            return f.call(moment, langCode) ||
			f.call(moment, 'en'); // the newer localData could return null, so fall back to en
        }


        var localeData = createObject(getLocaleData(options.lang)); // make a cheap copy

        if (options.monthNames) {
            localeData._months = options.monthNames;
        }
        if (options.monthNamesShort) {
            localeData._monthsShort = options.monthNamesShort;
        }
        if (options.dayNames) {
            localeData._weekdays = options.dayNames;
        }
        if (options.dayNamesShort) {
            localeData._weekdaysShort = options.dayNamesShort;
        }
        if (options.firstDay != null) {
            var _week = createObject(localeData._week); // _week: { dow: # }
            _week.dow = options.firstDay;
            localeData._week = _week;
        }



        // Calendar-specific Date Utilities
        // -----------------------------------------------------------------------------------


        t.defaultAllDayEventDuration = moment.duration(options.defaultAllDayEventDuration);
        t.defaultTimedEventDuration = moment.duration(options.defaultTimedEventDuration);


        // Builds a moment using the settings of the current calendar: timezone and language.
        // Accepts anything the vanilla moment() constructor accepts.
        t.moment = function () {
            var mom;

            if (options.timezone === 'local') {
                mom = fc.moment.apply(null, arguments);

                // Force the moment to be local, because fc.moment doesn't guarantee it.
                if (mom.hasTime()) { // don't give ambiguously-timed moments a local zone
                    mom.local();
                }
            }
            else if (options.timezone === 'UTC') {
                mom = fc.moment.utc.apply(null, arguments); // process as UTC
            }
            else {
                mom = fc.moment.parseZone.apply(null, arguments); // let the input decide the zone
            }

            if ('_locale' in mom) { // moment 2.8 and above
                mom._locale = localeData;
            }
            else { // pre-moment-2.8
                mom._lang = localeData;
            }

            return mom;
        };


        // Returns a boolean about whether or not the calendar knows how to calculate
        // the timezone offset of arbitrary dates in the current timezone.
        t.getIsAmbigTimezone = function () {
            return options.timezone !== 'local' && options.timezone !== 'UTC';
        };


        // Returns a copy of the given date in the current timezone of it is ambiguously zoned.
        // This will also give the date an unambiguous time.
        t.rezoneDate = function (date) {
            return t.moment(date.toArray());
        };


        // Returns a moment for the current date, as defined by the client's computer,
        // or overridden by the `now` option.
        t.getNow = function () {
            var now = options.now;
            if (typeof now === 'function') {
                now = now();
            }
            return t.moment(now);
        };


        // Calculates the week number for a moment according to the calendar's
        // `weekNumberCalculation` setting.
        t.calculateWeekNumber = function (mom) {
            var calc = options.weekNumberCalculation;

            if (typeof calc === 'function') {
                return calc(mom);
            }
            else if (calc === 'local') {
                return mom.week();
            }
            else if (calc.toUpperCase() === 'ISO') {
                return mom.isoWeek();
            }
        };


        // Get an event's normalized end date. If not present, calculate it from the defaults.
        t.getEventEnd = function (event) {
            if (event.end) {
                return event.end.clone();
            }
            else {
                return t.getDefaultEventEnd(event.allDay, event.start);
            }
        };


        // Given an event's allDay status and start date, return swhat its fallback end date should be.
        t.getDefaultEventEnd = function (allDay, start) { // TODO: rename to computeDefaultEventEnd
            var end = start.clone();

            if (allDay) {
                end.stripTime().add(t.defaultAllDayEventDuration);
            }
            else {
                end.add(t.defaultTimedEventDuration);
            }

            if (t.getIsAmbigTimezone()) {
                end.stripZone(); // we don't know what the tzo should be
            }

            return end;
        };



        // Date-formatting Utilities
        // -----------------------------------------------------------------------------------


        // Like the vanilla formatRange, but with calendar-specific settings applied.
        t.formatRange = function (m1, m2, formatStr) {

            // a function that returns a formatStr // TODO: in future, precompute this
            if (typeof formatStr === 'function') {
                formatStr = formatStr.call(t, options, localeData);
            }

            return formatRange(m1, m2, formatStr, null, options.isRTL);
        };


        // Like the vanilla formatDate, but with calendar-specific settings applied.
        t.formatDate = function (mom, formatStr) {

            // a function that returns a formatStr // TODO: in future, precompute this
            if (typeof formatStr === 'function') {
                formatStr = formatStr.call(t, options, localeData);
            }

            return formatDate(mom, formatStr);
        };



        // Imports
        // -----------------------------------------------------------------------------------


        EventManager.call(t, options);
        var isFetchNeeded = t.isFetchNeeded;
        var fetchEvents = t.fetchEvents;



        // Locals
        // -----------------------------------------------------------------------------------


        var _element = element[0];
        var header;
        var headerElement;
        var content;
        var tm; // for making theme classes
        var currentView;
        var suggestedViewHeight;
        var windowResizeProxy; // wraps the windowResize function
        var ignoreWindowResize = 0;
        var date;
        var events = [];



        // Main Rendering
        // -----------------------------------------------------------------------------------


        if (options.defaultDate != null) {
            date = t.moment(options.defaultDate);
        }
        else {
            date = t.getNow();
        }


        function render(inc) {
            if (!content) {
                initialRender();
            }
            else if (elementVisible()) {
                // mainly for the public API
                calcSize();
                renderView(inc);
            }
        }


        function initialRender() {
            tm = options.theme ? 'ui' : 'fc';
            element.addClass('fcOld');

            if (options.isRTL) {
                element.addClass('fc-rtl');
            }
            else {
                element.addClass('fc-ltr');
            }

            if (options.theme) {
                element.addClass('ui-widget');
            }
            else {
                element.addClass('fc-unthemed');
            }

            var $viewBox = $('<div class="fc-view-container-box"></div>');
            $viewBox.prependTo(element);
            content = $("<div class='fc-view-container'/>").prependTo($viewBox);

            header = new Header(t, options);
            headerElement = header.render();
            if (headerElement) {
                element.prepend(headerElement);
            }

            changeView(options.defaultView);

            if (options.handleWindowResize) {
                windowResizeProxy = debounce(windowResize, options.windowResizeDelay); // prevents rapid calls
                $(window).resize(windowResizeProxy);
            }
        }


        function destroy() {

            if (currentView) {
                currentView.destroy();
            }

            header.destroy();
            content.remove();
            element.removeClass('fcOld fc-ltr fc-rtl fc-unthemed ui-widget');

            $(window).unbind('resize', windowResizeProxy);
        }


        function elementVisible() {
            return element.is(':visible');
        }



        // View Rendering
        // -----------------------------------------------------------------------------------


        function changeView(viewName) {
            renderView(0, viewName);
        }


        // Renders a view because of a date change, view-type change, or for the first time
        function renderView(delta, viewName) {
            ignoreWindowResize++;

            // if viewName is changing, destroy the old view
            if (currentView && viewName && currentView.name !== viewName) {
                header.deactivateButton(currentView.name);
                freezeContentHeight(); // prevent a scroll jump when view element is removed
                if (currentView.start) { // rendered before?
                    currentView.destroy();
                }
                currentView.el.remove();
                currentView = null;
            }

            // if viewName changed, or the view was never created, create a fresh view
            if (!currentView && viewName) {
                currentView = new fcViews[viewName](t);
                currentView.el = $("<div class='fc-view fc-" + viewName + "-view' />").appendTo(content);
                header.activateButton(viewName);
            }

            if (currentView) {

                // let the view determine what the delta means
                if (delta) {
                    date = currentView.incrementDate(date, delta);
                }

                // render or rerender the view
                if (
				!currentView.start || // never rendered before
				delta || // explicit date window change
				!date.isWithin(currentView.intervalStart, currentView.intervalEnd) // implicit date window change
			) {
                    if (elementVisible()) {

                        freezeContentHeight();
                        if (currentView.start) { // rendered before?
                            currentView.destroy();
                        }
                        currentView.render(date);
                        unfreezeContentHeight();

                        // need to do this after View::render, so dates are calculated
                        updateTitle();
                        updateTodayButton();

                        if (defaults.firstLoading) {
                            getAndRenderEvents();
                            defaults.firstLoading = false;
                        }
                        //getAndRenderEvents();
                    }
                }
            }

            unfreezeContentHeight(); // undo any lone freezeContentHeight calls
            ignoreWindowResize--;
        }



        // Resizing
        // -----------------------------------------------------------------------------------


        t.getSuggestedViewHeight = function () {
            if (suggestedViewHeight === undefined) {
                calcSize();
            }
            return suggestedViewHeight;
        };


        t.isHeightAuto = function () {
            return options.contentHeight === 'auto' || options.height === 'auto';
        };


        function updateSize(shouldRecalc) {
            if (elementVisible()) {

                if (shouldRecalc) {
                    _calcSize();
                }

                ignoreWindowResize++;
                currentView.updateSize(true); // isResize=true. will poll getSuggestedViewHeight() and isHeightAuto()
                ignoreWindowResize--;

                return true; // signal success
            }
        }


        function calcSize() {
            if (elementVisible()) {
                _calcSize();
            }
        }


        function _calcSize() { // assumes elementVisible
            if (typeof options.contentHeight === 'number') { // exists and not 'auto'
                suggestedViewHeight = options.contentHeight;
            }
            else if (typeof options.height === 'number') { // exists and not 'auto'
                suggestedViewHeight = options.height - (headerElement ? headerElement.outerHeight(true) : 0);
            }
            else {
                suggestedViewHeight = Math.round(content.width() / Math.max(options.aspectRatio, .5));
            }
        }


        function windowResize(ev) {
            if (
			!ignoreWindowResize &&
			ev.target === window && // so we don't process jqui "resize" events that have bubbled up
			currentView.start // view has already been rendered
		) {
                if (updateSize(true)) {
                    currentView.trigger('windowResize', _element);
                }
            }
        }



        /* Event Fetching/Rendering
        -----------------------------------------------------------------------------*/
        // TODO: going forward, most of this stuff should be directly handled by the view


        function refetchEvents() { // can be called as an API method
            destroyEvents(); // so that events are cleared before user starts waiting for AJAX
            fetchAndRenderEvents();
        }


        function renderEvents() { // destroys old events if previously rendered
            if (elementVisible()) {
                freezeContentHeight();
                currentView.destroyEvents(); // no performance cost if never rendered
                currentView.renderEvents(events);
                unfreezeContentHeight();
            }
        }


        function destroyEvents() {
            freezeContentHeight();
            currentView.destroyEvents();
            unfreezeContentHeight();
        }


        function getAndRenderEvents() {
            if (!options.lazyFetching || isFetchNeeded(currentView.start, currentView.end)) {
                fetchAndRenderEvents();
            }
            else {
                renderEvents();
            }
        }


        function fetchAndRenderEvents() {
            fetchEvents(currentView.start, currentView.end);
            // ... will call reportEvents
            // ... which will call renderEvents
        }


        // called when event data arrives
        function reportEvents(_events) {
            events = _events;
            renderEvents();
        }


        // called when a single event's data has been changed
        function reportEventChange() {
            renderEvents();
        }



        /* Header Updating
        -----------------------------------------------------------------------------*/


        function updateTitle() {
            header.updateTitle(currentView.title);
        }


        function updateTodayButton() {
            var now = t.getNow();
            if (now.isWithin(currentView.intervalStart, currentView.intervalEnd)) {
                header.disableButton('today');
            }
            else {
                header.enableButton('today');
            }
        }



        /* Selection
        -----------------------------------------------------------------------------*/


        function select(start, end) {

            start = t.moment(start);
            if (end) {
                end = t.moment(end);
            }
            else if (start.hasTime()) {
                end = start.clone().add(t.defaultTimedEventDuration);
            }
            else {
                end = start.clone().add(t.defaultAllDayEventDuration);
            }

            currentView.select(start, end);
        }


        function unselect() { // safe to be called before renderView
            if (currentView) {
                currentView.unselect();
            }
        }



        /* Date
        -----------------------------------------------------------------------------*/


        function prev() {
            renderView(-1);
        }


        function next() {
            renderView(1);
        }


        function prevYear() {
            date.add(-1, 'years');
            renderView();
        }


        function nextYear() {
            date.add(1, 'years');
            renderView();
        }


        function today() {
            date = t.getNow();
            renderView();
        }


        function gotoDate(dateInput) {
            date = t.moment(dateInput);
            renderView();
        }


        function incrementDate(delta) {
            date.add(moment.duration(delta));
            renderView();
        }


        // Forces navigation to a view for the given date.
        // `viewName` can be a specific view name or a generic one like "week" or "day".
        function zoomTo(newDate, viewName) {
            var viewStr;
            var match;

            if (!viewName || fcViews[viewName] === undefined) { // a general view name, or "auto"
                viewName = viewName || 'day';
                viewStr = header.getViewsWithButtons().join(' '); // space-separated string of all the views in the header

                // try to match a general view name, like "week", against a specific one, like "agendaWeek"
                match = viewStr.match(new RegExp('\\w+' + capitaliseFirstLetter(viewName)));

                // fall back to the day view being used in the header
                if (!match) {
                    match = viewStr.match(/\w+Day/);
                }

                viewName = match ? match[0] : 'agendaDay'; // fall back to agendaDay
            }

            date = newDate;
            changeView(viewName);
        }


        function getDate() {
            return date.clone();
        }



        /* Height "Freezing"
        -----------------------------------------------------------------------------*/


        function freezeContentHeight() {
            content.css({
                width: '100%',
                height: content.height(),
                overflow: 'hidden'
            });
        }


        function unfreezeContentHeight() {
            content.css({
                width: '',
                height: '',
                overflow: ''
            });
        }



        /* Misc
        -----------------------------------------------------------------------------*/


        function getCalendar() {
            return t;
        }


        function getView() {
            return currentView;
        }


        function option(name, value) {
            if (value === undefined) {
                return options[name];
            }
            if (name == 'height' || name == 'contentHeight' || name == 'aspectRatio') {
                options[name] = value;
                updateSize(true); // true = allow recalculation of height
            }
        }


        function trigger(name, thisObj) {
            if (options[name]) {
                return options[name].apply(
				thisObj || _element,
				Array.prototype.slice.call(arguments, 2)
			);
            }
        }

    }

    ; ;

    /* Top toolbar area with buttons and title
    ----------------------------------------------------------------------------------------------------------------------*/
    // TODO: rename all header-related things to "toolbar"

    function Header(calendar, options) {
        var t = this;

        // exports
        t.render = render;
        t.destroy = destroy;
        t.updateTitle = updateTitle;
        t.activateButton = activateButton;
        t.deactivateButton = deactivateButton;
        t.disableButton = disableButton;
        t.enableButton = enableButton;
        t.getViewsWithButtons = getViewsWithButtons;

        // locals
        var el = $();
        var viewsWithButtons = [];
        var tm;


        function render() {
            var sections = options.header;

            tm = options.theme ? 'ui' : 'fc';

            if (sections) {
                el = $("<div class='fc-toolbar'/>")
				.append(renderSection('left'))
				.append(renderSection('right'))
				.append(renderSection('center'))
				.append('<div class="fc-clear"/>');

                return el;
            }
        }


        function destroy() {
            el.remove();
        }


        function renderSection(position) {
            var sectionEl = $('<div class="fc-' + position + '"/>');
            var buttonStr = options.header[position];

            if (buttonStr) {
                $.each(buttonStr.split(' '), function (i) {
                    var groupChildren = $();
                    var isOnlyButtons = true;
                    var groupEl;

                    $.each(this.split(','), function (j, buttonName) {
                        var buttonClick;
                        var themeIcon;
                        var normalIcon;
                        var defaultText;
                        var customText;
                        var innerHtml;
                        var classes;
                        var button;

                        if (buttonName == 'title') {
                            groupChildren = groupChildren.add($('<h2>&nbsp;</h2>')); // we always want it to take up height
                            isOnlyButtons = false;
                        }
                        else {
                            if (calendar[buttonName]) { // a calendar method
                                buttonClick = function () {
                                    calendar[buttonName]();
                                };
                            }
                            else if (fcViews[buttonName]) { // a view name
                                buttonClick = function () {
                                    calendar.changeView(buttonName);
                                };
                                viewsWithButtons.push(buttonName);
                            }
                            if (buttonClick) {

                                // smartProperty allows different text per view button (ex: "Agenda Week" vs "Basic Week")
                                themeIcon = smartProperty(options.themeButtonIcons, buttonName);
                                normalIcon = smartProperty(options.buttonIcons, buttonName);
                                defaultText = smartProperty(options.defaultButtonText, buttonName);
                                customText = smartProperty(options.buttonText, buttonName);

                                if (customText) {
                                    innerHtml = htmlEscape(customText);
                                }
                                else if (themeIcon && options.theme) {
                                    innerHtml = "<span class='ui-icon ui-icon-" + themeIcon + "'></span>";
                                }
                                else if (normalIcon && !options.theme) {
                                    innerHtml = "<span class='fc-icon fc-icon-" + normalIcon + "'></span>";
                                }
                                else {
                                    innerHtml = htmlEscape(defaultText || buttonName);
                                }

                                classes = [
								'fc-' + buttonName + '-button',
								tm + '-button',
								tm + '-state-default'
							];

                                button = $( // type="button" so that it doesn't submit a form
								'<button type="button" class="' + classes.join(' ') + '">' +
									innerHtml +
								'</button>'
								)
								.click(function () {
								    // don't process clicks for disabled buttons
								    if (!button.hasClass(tm + '-state-disabled')) {
								        defaults.firstLoading = true;
								        buttonClick();

								        // after the click action, if the button becomes the "active" tab, or disabled,
								        // it should never have a hover class, so remove it now.
								        if (
											button.hasClass(tm + '-state-active') ||
											button.hasClass(tm + '-state-disabled')
										) {
								            button.removeClass(tm + '-state-hover');
								        }
								    }
								})
								.mousedown(function () {
								    // the *down* effect (mouse pressed in).
								    // only on buttons that are not the "active" tab, or disabled
								    button
										.not('.' + tm + '-state-active')
										.not('.' + tm + '-state-disabled')
										.addClass(tm + '-state-down');
								})
								.mouseup(function () {
								    // undo the *down* effect
								    button.removeClass(tm + '-state-down');
								})
								.hover(
									function () {
									    // the *hover* effect.
									    // only on buttons that are not the "active" tab, or disabled
									    button
											.not('.' + tm + '-state-active')
											.not('.' + tm + '-state-disabled')
											.addClass(tm + '-state-hover');
									},
									function () {
									    // undo the *hover* effect
									    button
											.removeClass(tm + '-state-hover')
											.removeClass(tm + '-state-down'); // if mouseleave happens before mouseup
									}
								);

                                groupChildren = groupChildren.add(button);
                            }
                        }
                    });

                    if (isOnlyButtons) {
                        groupChildren
						.first().addClass(tm + '-corner-left').end()
						.last().addClass(tm + '-corner-right').end();
                    }

                    if (groupChildren.length > 1) {
                        groupEl = $('<div/>');
                        if (isOnlyButtons) {
                            groupEl.addClass('fc-button-group');
                        }
                        groupEl.append(groupChildren);
                        sectionEl.append(groupEl);
                    }
                    else {
                        sectionEl.append(groupChildren); // 1 or 0 children
                    }
                });
            }

            return sectionEl;
        }


        function updateTitle(text) {
            el.find('h2').text(text);
        }


        function activateButton(buttonName) {
            el.find('.fc-' + buttonName + '-button')
			.addClass(tm + '-state-active');
        }


        function deactivateButton(buttonName) {
            el.find('.fc-' + buttonName + '-button')
			.removeClass(tm + '-state-active');
        }


        function disableButton(buttonName) {
            el.find('.fc-' + buttonName + '-button')
			.attr('disabled', 'disabled')
			.addClass(tm + '-state-disabled');
        }


        function enableButton(buttonName) {
            el.find('.fc-' + buttonName + '-button')
			.removeAttr('disabled')
			.removeClass(tm + '-state-disabled');
        }


        function getViewsWithButtons() {
            return viewsWithButtons;
        }

    }

    ; ;

    fc.sourceNormalizers = [];
    fc.sourceFetchers = [];

    var ajaxDefaults = {
        dataType: 'json',
        cache: false
    };

    var eventGUID = 1;


    function EventManager(options) { // assumed to be a calendar
        var t = this;


        // exports
        t.isFetchNeeded = isFetchNeeded;
        t.fetchEvents = fetchEvents;
        t.addEventSource = addEventSource;
        t.removeEventSource = removeEventSource;
        t.updateEvent = updateEvent;
        t.renderEvent = renderEvent;
        t.removeEvents = removeEvents;
        t.clientEvents = clientEvents;
        t.mutateEvent = mutateEvent;


        // imports
        var trigger = t.trigger;
        var getView = t.getView;
        var reportEvents = t.reportEvents;
        var getEventEnd = t.getEventEnd;


        // locals
        var stickySource = { events: [] };
        var sources = [stickySource];
        var rangeStart, rangeEnd;
        var currentFetchID = 0;
        var pendingSourceCnt = 0;
        var loadingLevel = 0;
        var cache = [];


        $.each(
		(options.events ? [options.events] : []).concat(options.eventSources || []),
		function (i, sourceInput) {
		    var source = buildEventSource(sourceInput);
		    if (source) {
		        sources.push(source);
		    }
		}
	);



        /* Fetching
        -----------------------------------------------------------------------------*/


        function isFetchNeeded(start, end) {
            return !rangeStart || // nothing has been fetched yet?
            // or, a part of the new range is outside of the old range? (after normalizing)
			start.clone().stripZone() < rangeStart.clone().stripZone() ||
			end.clone().stripZone() > rangeEnd.clone().stripZone();
        }


        function fetchEvents(start, end) {
            rangeStart = start;
            rangeEnd = end;
            cache = [];
            var fetchID = ++currentFetchID;
            var len = sources.length;
            pendingSourceCnt = len;
            for (var i = 0; i < len; i++) {
                fetchEventSource(sources[i], fetchID);
            }
        }


        function fetchEventSource(source, fetchID) {
            _fetchEventSource(source, function (events) {
                var isArraySource = $.isArray(source.events);
                var i;
                var event;

                if (fetchID == currentFetchID) {

                    if (events) {
                        for (i = 0; i < events.length; i++) {
                            event = events[i];

                            // event array sources have already been convert to Event Objects
                            if (!isArraySource) {
                                event = buildEvent(event, source);
                            }

                            if (event) {
                                cache.push(event);
                            }
                        }
                    }

                    pendingSourceCnt--;
                    if (!pendingSourceCnt) {
                        reportEvents(cache);
                    }
                }
            });
        }


        function _fetchEventSource(source, callback) {
            var i;
            var fetchers = fc.sourceFetchers;
            var res;

            for (i = 0; i < fetchers.length; i++) {
                res = fetchers[i].call(
				t, // this, the Calendar object
				source,
				rangeStart.clone(),
				rangeEnd.clone(),
				options.timezone,
				callback
			);

                if (res === true) {
                    // the fetcher is in charge. made its own async request
                    return;
                }
                else if (typeof res == 'object') {
                    // the fetcher returned a new source. process it
                    _fetchEventSource(res, callback);
                    return;
                }
            }

            var events = source.events;
            if (events) {
                if ($.isFunction(events)) {
                    pushLoading();
                    events.call(
					t, // this, the Calendar object
					rangeStart.clone(),
					rangeEnd.clone(),
					options.timezone,
					function (events) {
					    callback(events);
					    popLoading();
					}
				);
                }
                else if ($.isArray(events)) {
                    callback(events);
                }
                else {
                    callback();
                }
            } else {
                var url = source.url;
                if (url) {
                    var success = source.success;
                    var error = source.error;
                    var complete = source.complete;

                    // retrieve any outbound GET/POST $.ajax data from the options
                    var customData;
                    if ($.isFunction(source.data)) {
                        // supplied as a function that returns a key/value object
                        customData = source.data();
                    }
                    else {
                        // supplied as a straight key/value object
                        customData = source.data;
                    }

                    // use a copy of the custom data so we can modify the parameters
                    // and not affect the passed-in object.
                    var data = $.extend({}, customData || {});

                    var startParam = firstDefined(source.startParam, options.startParam);
                    var endParam = firstDefined(source.endParam, options.endParam);
                    var timezoneParam = firstDefined(source.timezoneParam, options.timezoneParam);

                    if (startParam) {
                        data[startParam] = moment(rangeStart.format()).format();
                    }
                    if (endParam) {
                        data[endParam] = moment(rangeEnd.format()).format();
                    }
                    if (options.timezone && options.timezone != 'local') {
                        data[timezoneParam] = options.timezone;
                    }

                    pushLoading();

                    //新加载数据方法
                    source.url(data).then(function(events){
                        events = events.data.calendars || [];
                        var res = applyAll(success, this, arguments);
                        if ($.isArray(res)) {
                            events = res;
                        }
                        events.forEach((item) => {
                            if (!item.allDay && moment(item.startTime).format('YYYY-MM-DD') !== moment(item.endTime).format('YYYY-MM-DD')) {
                                item.allDay = true;
                            }

                            if (item.allDay && !item.isAllDay && moment(item.startTime).format('YYYY-MM-DD') === moment(item.endTime).format('YYYY-MM-DD')) {
                                item.allDay = false;
                            }
                        });
                        callback(events);
                        popLoading();
                    }).fail(function(){
                        applyAll(error, this, arguments);
                        callback();
                    });

                    //插件原来加载数据方法
                    // $.ajax($.extend({}, ajaxDefaults, source, {
                    //     data: data,
                    //     success: function (events) {
                    //         events = events || [];
                    //         var res = applyAll(success, this, arguments);
                    //         if ($.isArray(res)) {
                    //             events = res;
                    //         }
                    //         callback(events);
                    //     },
                    //     error: function () {
                    //         applyAll(error, this, arguments);
                    //         callback();
                    //     },
                    //     complete: function () {
                    //         applyAll(complete, this, arguments);
                    //         popLoading();
                    //     }
                    // }));
                } else {
                    callback();
                }
            }
        }



        /* Sources
        -----------------------------------------------------------------------------*/


        function addEventSource(sourceInput) {
            var source = buildEventSource(sourceInput);
            if (source) {
                sources.push(source);
                pendingSourceCnt++;
                fetchEventSource(source, currentFetchID); // will eventually call reportEvents
            }
        }


        function buildEventSource(sourceInput) { // will return undefined if invalid source
            var normalizers = fc.sourceNormalizers;
            var source;
            var i;

            if ($.isFunction(sourceInput) || $.isArray(sourceInput)) {
                source = { events: sourceInput };
            }
            else if (typeof sourceInput === 'string') {
                source = { url: sourceInput };
            }
            else if (typeof sourceInput === 'object') {
                source = $.extend({}, sourceInput); // shallow copy
            }

            if (source) {

                // TODO: repeat code, same code for event classNames
                if (source.className) {
                    if (typeof source.className === 'string') {
                        source.className = source.className.split(/\s+/);
                    }
                    // otherwise, assumed to be an array
                }
                else {
                    source.className = [];
                }

                // for array sources, we convert to standard Event Objects up front
                if ($.isArray(source.events)) {
                    source.events = $.map(source.events, function (eventInput) {
                        return buildEvent(eventInput, source);
                    });
                }

                for (i = 0; i < normalizers.length; i++) {
                    normalizers[i].call(t, source);
                }

                return source;
            }
        }


        function removeEventSource(source) {
            sources = $.grep(sources, function (src) {
                return !isSourcesEqual(src, source);
            });
            // remove all client events from that source
            cache = $.grep(cache, function (e) {
                return !isSourcesEqual(e.source, source);
            });
            reportEvents(cache);
        }


        function isSourcesEqual(source1, source2) {
            return source1 && source2 && getSourcePrimitive(source1) == getSourcePrimitive(source2);
        }


        function getSourcePrimitive(source) {
            return ((typeof source == 'object') ? (source.events || source.url) : '') || source;
        }



        /* Manipulation
        -----------------------------------------------------------------------------*/


        function updateEvent(event) {

            event.start = t.moment(event.start);
            if (event.end) {
                event.end = t.moment(event.end);
            }

            mutateEvent(event);
            propagateMiscProperties(event);
            reportEvents(cache); // reports event modifications (so we can redraw)
        }


        var miscCopyableProps = [
		'title',
		'url',
		'allDay',
		'className',
		'editable',
		'color',
		'backgroundColor',
		'borderColor',
		'textColor'
	];

        function propagateMiscProperties(event) {
            var i;
            var cachedEvent;
            var j;
            var prop;

            for (i = 0; i < cache.length; i++) {
                cachedEvent = cache[i];
                if (cachedEvent._id == event._id && cachedEvent !== event) {
                    for (j = 0; j < miscCopyableProps.length; j++) {
                        prop = miscCopyableProps[j];
                        if (event[prop] !== undefined) {
                            cachedEvent[prop] = event[prop];
                        }
                    }
                }
            }
        }



        function renderEvent(eventData, stick) {
            var event = buildEvent(eventData);
            if (event) {
                if (!event.source) {
                    if (stick) {
                        stickySource.events.push(event);
                        event.source = stickySource;
                    }
                    cache.push(event);
                }
                reportEvents(cache);
            }
        }


        function removeEvents(filter) {
            var eventID;
            var i;

            if (filter == null) { // null or undefined. remove all events
                filter = function () { return true; }; // will always match
            }
            else if (!$.isFunction(filter)) { // an event ID
                eventID = filter + '';
                filter = function (event) {
                    return event._id == eventID;
                };
            }

            // Purge event(s) from our local cache
            cache = $.grep(cache, filter, true); // inverse=true

            // Remove events from array sources.
            // This works because they have been converted to official Event Objects up front.
            // (and as a result, event._id has been calculated).
            for (i = 0; i < sources.length; i++) {
                if ($.isArray(sources[i].events)) {
                    sources[i].events = $.grep(sources[i].events, filter, true);
                }
            }

            reportEvents(cache);
        }


        function clientEvents(filter) {
            if ($.isFunction(filter)) {
                return $.grep(cache, filter);
            }
            else if (filter != null) { // not null, not undefined. an event ID
                filter += '';
                return $.grep(cache, function (e) {
                    return e._id == filter;
                });
            }
            return cache; // else, return all
        }



        /* Loading State
        -----------------------------------------------------------------------------*/


        function pushLoading() {
            if (!(loadingLevel++)) {
                trigger('loading', null, true, getView());
            }
        }


        function popLoading() {
            if (!(--loadingLevel)) {
                trigger('loading', null, false, getView());
            }
        }



        /* Event Normalization
        -----------------------------------------------------------------------------*/

        function buildEvent(data, source) { // source may be undefined!
            var out = {};
            var start;
            var end;
            var allDay;
            var allDayDefault;
            var isAddOneDay = moment(data.start).format('YYYY-MM-DD') !== moment(data.end).format('YYYY-MM-DD') && data.start.substr(0, 10) === data.end.substr(0, 10);
            var isReduceOneDay = moment(data.start).format('YYYY-MM-DD') === moment(data.end).add('d', -1).format('YYYY-MM-DD') && data.start.substr(0, 10) !== data.end.substr(0, 10)

            if (options.eventDataTransform) {
                data = options.eventDataTransform(data);
            }
            if (source && source.eventDataTransform) {
                data = source.eventDataTransform(data);
            }

            start = t.moment(data.start || data.date); // "date" is an alias for "start"
            if (!start.isValid()) {
                return;
            }

            end = null;
            if (data.end) {
                end = t.moment(data.end);
                if (!end.isValid()) {
                    return;
                }
            }

            allDay = data.allDay;
            if (allDay === undefined) {
                allDayDefault = firstDefined(
				source ? source.allDayDefault : undefined,
				options.allDayDefault
			);
                if (allDayDefault !== undefined) {
                    // use the default
                    allDay = allDayDefault;
                }
                else {
                    // all dates need to have ambig time for the event to be considered allDay
                    allDay = !start.hasTime() && (!end || !end.hasTime());
                }
            }

            // normalize the date based on allDay
            if (allDay) {
                // neither date should have a time
                if (start.hasTime()) {
                    start.stripTime();
                }
                if (end && end.hasTime()) {
                    end.stripTime();
                }
                if (data.isTask || isAddOneDay) {
                    end = end.add(1, 'd');
                }
            }
            else {
                // force a time/zone up the dates
                if (!start.hasTime()) {
                    start = t.rezoneDate(start);
                }
                if (end && isReduceOneDay) {
                    end = end.add('d', -1);
                }
                if (end && !end.hasTime()) {
                    end = t.rezoneDate(end);
                }
            }

            // Copy all properties over to the resulting object.
            // The special-case properties will be copied over afterwards.
            $.extend(out, data);

            if (source) {
                out.source = source;
            }

            out._id = data._id || (data.id === undefined ? '_fc' + eventGUID++ : data.id + '');

            if (data.className) {
                if (typeof data.className == 'string') {
                    out.className = data.className.split(/\s+/);
                }
                else { // assumed to be an array
                    out.className = data.className;
                }
            }
            else {
                out.className = [];
            }

            out.allDay = allDay;
            out.start = start;
            out.end = end;

            if (options.forceEventDuration && !out.end) {
                out.end = getEventEnd(out);
            }

            backupEventDates(out);

            return out;
        }



        /* Event Modification Math
        -----------------------------------------------------------------------------------------*/


        // Modify the date(s) of an event and make this change propagate to all other events with
        // the same ID (related repeating events).
        //
        // If `newStart`/`newEnd` are not specified, the "new" dates are assumed to be `event.start` and `event.end`.
        // The "old" dates to be compare against are always `event._start` and `event._end` (set by EventManager).
        //
        // Returns an object with delta information and a function to undo all operations.
        //
        function mutateEvent(event, newStart, newEnd) {
            var oldAllDay = event._allDay;
            var oldStart = event._start;
            var oldEnd = event._end;
            var clearEnd = false;
            var newAllDay;
            var dateDelta;
            var durationDelta;
            var undoFunc;

            // if no new dates were passed in, compare against the event's existing dates
            if (!newStart && !newEnd) {
                newStart = event.start;
                newEnd = event.end;
            }

            // NOTE: throughout this function, the initial values of `newStart` and `newEnd` are
            // preserved. These values may be undefined.

            // detect new allDay
            if (event.allDay != oldAllDay) { // if value has changed, use it
                newAllDay = event.allDay;
            }
            else { // otherwise, see if any of the new dates are allDay
                newAllDay = !(newStart || newEnd).hasTime();
            }

            // normalize the new dates based on allDay
            if (newAllDay) {
                if (newStart) {
                    newStart = newStart.clone().stripTime();
                }
                if (newEnd) {
                    newEnd = newEnd.clone().stripTime();
                }
            }

            // compute dateDelta
            if (newStart) {
                if (newAllDay) {
                    dateDelta = dayishDiff(newStart, oldStart.clone().stripTime()); // treat oldStart as allDay
                }
                else {
                    dateDelta = dayishDiff(newStart, oldStart);
                }
            }

            if (newAllDay != oldAllDay) {
                // if allDay has changed, always throw away the end
                clearEnd = true;
            }
            else if (newEnd) {
                durationDelta = dayishDiff(
                // new duration
				newEnd || t.getDefaultEventEnd(newAllDay, newStart || oldStart),
				newStart || oldStart
			).subtract(dayishDiff(
                // subtract old duration
				oldEnd || t.getDefaultEventEnd(oldAllDay, oldStart),
				oldStart
			));
            }

            //修改：04/27/2016 Cloud 当为特殊子日程时，不修改其他日程的位置
            undoFunc = mutateEvents(
                event.isChildCalendar ? [event] : clientEvents(event._id), // get events with this ID
                clearEnd,
                newAllDay,
                dateDelta,
                durationDelta
            );


            return {
                dateDelta: dateDelta,
                durationDelta: durationDelta,
                undo: undoFunc
            };
        }


        // Modifies an array of events in the following ways (operations are in order):
        // - clear the event's `end`
        // - convert the event to allDay
        // - add `dateDelta` to the start and end
        // - add `durationDelta` to the event's duration
        //
        // Returns a function that can be called to undo all the operations.
        //
        function mutateEvents(events, clearEnd, forceAllDay, dateDelta, durationDelta) {
            var isAmbigTimezone = t.getIsAmbigTimezone();
            var undoFunctions = [];

            $.each(events, function (i, event) {
                var oldAllDay = event._allDay;
                var oldStart = event._start;
                var oldEnd = event._end;
                var newAllDay = forceAllDay != null ? forceAllDay : oldAllDay;
                var newStart = oldStart.clone();
                var newEnd = (!clearEnd && oldEnd) ? oldEnd.clone() : null;

                // NOTE: this function is responsible for transforming `newStart` and `newEnd`,
                // which were initialized to the OLD values first. `newEnd` may be null.

                // normlize newStart/newEnd to be consistent with newAllDay
                if (newAllDay) {
                    newStart.stripTime();
                    if (newEnd) {
                        newEnd.stripTime();
                    }
                }
                else {
                    if (!newStart.hasTime()) {
                        newStart = t.rezoneDate(newStart);
                    }
                    if (newEnd && !newEnd.hasTime()) {
                        newEnd = t.rezoneDate(newEnd);
                    }
                }

                // ensure we have an end date if necessary
                if (!newEnd && (options.forceEventDuration || +durationDelta)) {
                    newEnd = t.getDefaultEventEnd(newAllDay, newStart);
                }

                // translate the dates
                newStart.add(dateDelta);
                if (newEnd) {
                    newEnd.add(dateDelta).add(durationDelta);
                }

                // if the dates have changed, and we know it is impossible to recompute the
                // timezone offsets, strip the zone.
                if (isAmbigTimezone) {
                    if (+dateDelta || +durationDelta) {
                        newStart.stripZone();
                        if (newEnd) {
                            newEnd.stripZone();
                        }
                    }
                }

                event.allDay = newAllDay;
                event.start = newStart;
                event.end = newEnd;
                backupEventDates(event);

                undoFunctions.push(function () {
                    event.allDay = oldAllDay;
                    event.start = oldStart;
                    event.end = oldEnd;
                    backupEventDates(event);
                });
            });

            return function () {
                for (var i = 0; i < undoFunctions.length; i++) {
                    undoFunctions[i]();
                }
            };
        }

    }


    // updates the "backup" properties, which are preserved in order to compute diffs later on.
    function backupEventDates(event) {
        event._allDay = event.allDay;
        event._start = event.start.clone();
        event._end = event.end ? event.end.clone() : null;
    }

    ; ;

    /* FullCalendar-specific DOM Utilities
    ----------------------------------------------------------------------------------------------------------------------*/


    // Given the scrollbar widths of some other container, create borders/margins on rowEls in order to match the left
    // and right space that was offset by the scrollbars. A 1-pixel border first, then margin beyond that.
    function compensateScroll(rowEls, scrollbarWidths) {
        if (scrollbarWidths.left) {
            rowEls.css({
                'border-left-width': 1,
                'margin-left': scrollbarWidths.left - 1
            });
        }
        if (scrollbarWidths.right) {
            rowEls.css({
                'border-right-width': 1,
                'margin-right': scrollbarWidths.right - 1
            });
        }
    }


    // Undoes compensateScroll and restores all borders/margins
    function uncompensateScroll(rowEls) {
        rowEls.css({
            'margin-left': '',
            'margin-right': '',
            'border-left-width': '',
            'border-right-width': ''
        });
    }


    // Given a total available height to fill, have `els` (essentially child rows) expand to accomodate.
    // By default, all elements that are shorter than the recommended height are expanded uniformly, not considering
    // any other els that are already too tall. if `shouldRedistribute` is on, it considers these tall rows and
    // reduces the available height.
    function distributeHeight(els, availableHeight, shouldRedistribute) {

        // *FLOORING NOTE*: we floor in certain places because zoom can give inaccurate floating-point dimensions,
        // and it is better to be shorter than taller, to avoid creating unnecessary scrollbars.

        var minOffset1 = Math.floor(availableHeight / els.length); // for non-last element
        var minOffset2 = Math.floor(availableHeight - minOffset1 * (els.length - 1)); // for last element *FLOORING NOTE*
        var flexEls = []; // elements that are allowed to expand. array of DOM nodes
        var flexOffsets = []; // amount of vertical space it takes up
        var flexHeights = []; // actual css height
        var usedHeight = 0;

        undistributeHeight(els); // give all elements their natural height

        // find elements that are below the recommended height (expandable).
        // important to query for heights in a single first pass (to avoid reflow oscillation).
        els.each(function (i, el) {
            var minOffset = i === els.length - 1 ? minOffset2 : minOffset1;
            var naturalOffset = $(el).outerHeight(true);

            if (naturalOffset < minOffset) {
                flexEls.push(el);
                flexOffsets.push(naturalOffset);
                flexHeights.push($(el).height());
            }
            else {
                // this element stretches past recommended height (non-expandable). mark the space as occupied.
                usedHeight += naturalOffset;
            }
        });

        // readjust the recommended height to only consider the height available to non-maxed-out rows.
        if (shouldRedistribute) {
            availableHeight -= usedHeight;
            minOffset1 = Math.floor(availableHeight / flexEls.length);
            minOffset2 = Math.floor(availableHeight - minOffset1 * (flexEls.length - 1)); // *FLOORING NOTE*
        }

        // assign heights to all expandable elements
        $(flexEls).each(function (i, el) {
            var minOffset = i === flexEls.length - 1 ? minOffset2 : minOffset1;
            var naturalOffset = flexOffsets[i];
            var naturalHeight = flexHeights[i];
            var newHeight = minOffset - (naturalOffset - naturalHeight); // subtract the margin/padding

            if (naturalOffset < minOffset) { // we check this again because redistribution might have changed things
                $(el).height(newHeight);
            }
        });
    }


    // Undoes distrubuteHeight, restoring all els to their natural height
    function undistributeHeight(els) {
        els.height('');
    }


    // Given `els`, a jQuery set of <td> cells, find the cell with the largest natural width and set the widths of all the
    // cells to be that width.
    // PREREQUISITE: if you want a cell to take up width, it needs to have a single inner element w/ display:inline
    function matchCellWidths(els) {
        var maxInnerWidth = 0;

        els.find('> *').each(function (i, innerEl) {
            var innerWidth = $(innerEl).outerWidth();
            if (innerWidth > maxInnerWidth) {
                maxInnerWidth = innerWidth;
            }
        });

        maxInnerWidth++; // sometimes not accurate of width the text needs to stay on one line. insurance

        els.width(maxInnerWidth);

        return maxInnerWidth;
    }


    // Turns a container element into a scroller if its contents is taller than the allotted height.
    // Returns true if the element is now a scroller, false otherwise.
    // NOTE: this method is best because it takes weird zooming dimensions into account
    function setPotentialScroller(containerEl, height) {
        containerEl.height(height).addClass('fc-scroller');

        // are scrollbars needed?
        if (containerEl[0].scrollHeight - 1 > containerEl[0].clientHeight) { // !!! -1 because IE is often off-by-one :(
            return true;
        }

        unsetScroller(containerEl); // undo
        return false;
    }


    // Takes an element that might have been a scroller, and turns it back into a normal element.
    function unsetScroller(containerEl) {
        containerEl.height('').removeClass('fc-scroller');
    }


    /* General DOM Utilities
    ----------------------------------------------------------------------------------------------------------------------*/


    // borrowed from https://github.com/jquery/jquery-ui/blob/1.11.0/ui/core.js#L51
    function getScrollParent(el) {
        var position = el.css('position'),
		scrollParent = el.parents().filter(function () {
		    var parent = $(this);
		    return (/(auto|scroll)/).test(
				parent.css('overflow') + parent.css('overflow-y') + parent.css('overflow-x')
			);
		}).eq(0);

        return position === 'fixed' || !scrollParent.length ? $(el[0].ownerDocument || document) : scrollParent;
    }


    // Given a container element, return an object with the pixel values of the left/right scrollbars.
    // Left scrollbars might occur on RTL browsers (IE maybe?) but I have not tested.
    // PREREQUISITE: container element must have a single child with display:block
    function getScrollbarWidths(container) {
        var containerLeft = container.offset().left;
        var containerRight = containerLeft + container.width();
        var inner = container.children();
        var innerLeft = inner.offset().left;
        var innerRight = innerLeft + inner.outerWidth();

        return {
            left: innerLeft - containerLeft,
            right: containerRight - innerRight
        };
    }


    // Returns a boolean whether this was a left mouse click and no ctrl key (which means right click on Mac)
    function isPrimaryMouseButton(ev) {
        return ev.which == 1 && !ev.ctrlKey;
    }


    /* FullCalendar-specific Misc Utilities
    ----------------------------------------------------------------------------------------------------------------------*/


    // Creates a basic segment with the intersection of the two ranges. Returns undefined if no intersection.
    // Expects all dates to be normalized to the same timezone beforehand.
    function intersectionToSeg(subjectStart, subjectEnd, intervalStart, intervalEnd) {
        var segStart, segEnd;
        var isStart, isEnd;

        if (subjectEnd > intervalStart && subjectStart < intervalEnd) { // in bounds at all?

            if (subjectStart >= intervalStart) {
                segStart = subjectStart.clone();
                isStart = true;
            }
            else {
                segStart = intervalStart.clone();
                isStart = false;
            }

            if (subjectEnd <= intervalEnd) {
                segEnd = subjectEnd.clone();
                isEnd = true;
            }
            else {
                segEnd = intervalEnd.clone();
                isEnd = false;
            }

            return {
                start: segStart,
                end: segEnd,
                isStart: isStart,
                isEnd: isEnd
            };
        }
    }


    function smartProperty(obj, name) { // get a camel-cased/namespaced property of an object
        obj = obj || {};
        if (obj[name] !== undefined) {
            return obj[name];
        }
        var parts = name.split(/(?=[A-Z])/),
		i = parts.length - 1, res;
        for (; i >= 0; i--) {
            res = obj[parts[i].toLowerCase()];
            if (res !== undefined) {
                return res;
            }
        }
        return obj['default'];
    }


    /* Date Utilities
    ----------------------------------------------------------------------------------------------------------------------*/

    var dayIDs = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];


    // Diffs the two moments into a Duration where full-days are recorded first, then the remaining time.
    // Moments will have their timezones normalized.
    function dayishDiff(a, b) {
        return moment.duration({
            days: a.clone().stripTime().diff(b.clone().stripTime(), 'days'),
            ms: a.time() - b.time()
        });
    }


    function isNativeDate(input) {
        return Object.prototype.toString.call(input) === '[object Date]' || input instanceof Date;
    }


    function dateCompare(a, b) { // works with Moments and native Dates
        return a - b;
    }


    /* General Utilities
    ----------------------------------------------------------------------------------------------------------------------*/

    fc.applyAll = applyAll; // export


    // Create an object that has the given prototype. Just like Object.create
    function createObject(proto) {
        var f = function () { };
        f.prototype = proto;
        return new f();
    }


    // Copies specifically-owned (non-protoype) properties of `b` onto `a`.
    // FYI, $.extend would copy *all* properties of `b` onto `a`.
    function extend(a, b) {
        for (var i in b) {
            if (b.hasOwnProperty(i)) {
                a[i] = b[i];
            }
        }
    }


    function applyAll(functions, thisObj, args) {
        if ($.isFunction(functions)) {
            functions = [functions];
        }
        if (functions) {
            var i;
            var ret;
            for (i = 0; i < functions.length; i++) {
                ret = functions[i].apply(thisObj, args) || ret;
            }
            return ret;
        }
    }


    function firstDefined() {
        for (var i = 0; i < arguments.length; i++) {
            if (arguments[i] !== undefined) {
                return arguments[i];
            }
        }
    }


    function htmlEscape(str) {
        var encodeHTMLRules = { '&': '&#38;', '<': '&lt;', '>': '&gt;', '"': '&#34;', "'": '&#39;', '/': '&#47;' };
        var matchHTML = /&(?!#?\w+;)|<|>|"|'|\//g;
        return str ? str.toString().replace(matchHTML, function (m) { return encodeHTMLRules[m] || m; }) : '';
    }


    function stripHtmlEntities(text) {
        return text.replace(/&.*?;/g, '');
    }


    function capitaliseFirstLetter(str) {
        return str.charAt(0).toUpperCase() + str.slice(1);
    }


    // Returns a function, that, as long as it continues to be invoked, will not
    // be triggered. The function will be called after it stops being called for
    // N milliseconds.
    // https://github.com/jashkenas/underscore/blob/1.6.0/underscore.js#L714
    function debounce(func, wait) {
        var timeoutId;
        var args;
        var context;
        var timestamp; // of most recent call
        var later = function () {
            var last = +new Date() - timestamp;
            if (last < wait && last > 0) {
                timeoutId = setTimeout(later, wait - last);
            }
            else {
                timeoutId = null;
                func.apply(context, args);
                if (!timeoutId) {
                    context = args = null;
                }
            }
        };

        return function () {
            context = this;
            args = arguments;
            timestamp = +new Date();
            if (!timeoutId) {
                timeoutId = setTimeout(later, wait);
            }
        };
    }

    ; ;

    var ambigDateOfMonthRegex = /^\s*\d{4}-\d\d$/;
    var ambigTimeOrZoneRegex =
	/^\s*\d{4}-(?:(\d\d-\d\d)|(W\d\d$)|(W\d\d-\d)|(\d\d\d))((T| )(\d\d(:\d\d(:\d\d(\.\d+)?)?)?)?)?$/;


    // Creating
    // -------------------------------------------------------------------------------------------------

    // Creates a new moment, similar to the vanilla moment(...) constructor, but with
    // extra features (ambiguous time, enhanced formatting). When gived an existing moment,
    // it will function as a clone (and retain the zone of the moment). Anything else will
    // result in a moment in the local zone.
    fc.moment = function () {
        return makeMoment(arguments);
    };

    // Sames as fc.moment, but forces the resulting moment to be in the UTC timezone.
    fc.moment.utc = function () {
        var mom = makeMoment(arguments, true);

        // Force it into UTC because makeMoment doesn't guarantee it.
        if (mom.hasTime()) { // don't give ambiguously-timed moments a UTC zone
            mom.utc();
        }

        return mom;
    };

    // Same as fc.moment, but when given an ISO8601 string, the timezone offset is preserved.
    // ISO8601 strings with no timezone offset will become ambiguously zoned.
    fc.moment.parseZone = function () {
        return makeMoment(arguments, true, true);
    };

    // Builds an FCMoment from args. When given an existing moment, it clones. When given a native
    // Date, or called with no arguments (the current time), the resulting moment will be local.
    // Anything else needs to be "parsed" (a string or an array), and will be affected by:
    //    parseAsUTC - if there is no zone information, should we parse the input in UTC?
    //    parseZone - if there is zone information, should we force the zone of the moment?
    function makeMoment(args, parseAsUTC, parseZone) {
        var input = args[0];
        var isSingleString = args.length == 1 && typeof input === 'string';
        var isAmbigTime;
        var isAmbigZone;
        var ambigMatch;
        var output; // an object with fields for the new FCMoment object

        if (moment.isMoment(input)) {
            output = moment.apply(null, args); // clone it

            // the ambig properties have not been preserved in the clone, so reassign them
            if (input._ambigTime) {
                output._ambigTime = true;
            }
            if (input._ambigZone) {
                output._ambigZone = true;
            }
        }
        else if (isNativeDate(input) || input === undefined) {
            output = moment.apply(null, args); // will be local
        }
        else { // "parsing" is required
            isAmbigTime = false;
            isAmbigZone = false;

            if (isSingleString) {
                if (ambigDateOfMonthRegex.test(input)) {
                    // accept strings like '2014-05', but convert to the first of the month
                    input += '-01';
                    args = [input]; // for when we pass it on to moment's constructor
                    isAmbigTime = true;
                    isAmbigZone = true;
                }
                else if ((ambigMatch = ambigTimeOrZoneRegex.exec(input))) {
                    isAmbigTime = !ambigMatch[5]; // no time part?
                    isAmbigZone = true;
                }
            }
            else if ($.isArray(input)) {
                // arrays have no timezone information, so assume ambiguous zone
                isAmbigZone = true;
            }
            // otherwise, probably a string with a format

            if (parseAsUTC) {
                output = moment.utc.apply(moment, args);
            }
            else {
                output = moment.apply(null, args);
            }

            if (isAmbigTime) {
                output._ambigTime = true;
                output._ambigZone = true; // ambiguous time always means ambiguous zone
            }
            else if (parseZone) { // let's record the inputted zone somehow
                if (isAmbigZone) {
                    output._ambigZone = true;
                }
                else if (isSingleString) {
                    output.zone(input); // if not a valid zone, will assign UTC
                }
            }
        }

        return new FCMoment(output);
    }

    // Our subclass of Moment.
    // Accepts an object with the internal Moment properties that should be copied over to
    // `this` object (most likely another Moment object). The values in this data must not
    // be referenced by anything else (two moments sharing a Date object for example).
    function FCMoment(internalData) {
        extend(this, internalData);
    }

    // Chain the prototype to Moment's
    FCMoment.prototype = createObject(moment.fn);

    // We need this because Moment's implementation won't create an FCMoment,
    // nor will it copy over the ambig flags.
    FCMoment.prototype.clone = function () {
        return makeMoment([this]);
    };


    // Time-of-day
    // -------------------------------------------------------------------------------------------------

    // GETTER
    // Returns a Duration with the hours/minutes/seconds/ms values of the moment.
    // If the moment has an ambiguous time, a duration of 00:00 will be returned.
    //
    // SETTER
    // You can supply a Duration, a Moment, or a Duration-like argument.
    // When setting the time, and the moment has an ambiguous time, it then becomes unambiguous.
    FCMoment.prototype.time = function (time) {
        if (time == null) { // getter
            return moment.duration({
                hours: this.hours(),
                minutes: this.minutes(),
                seconds: this.seconds(),
                milliseconds: this.milliseconds()
            });
        }
        else { // setter

            delete this._ambigTime; // mark that the moment now has a time

            if (!moment.isDuration(time) && !moment.isMoment(time)) {
                time = moment.duration(time);
            }

            // The day value should cause overflow (so 24 hours becomes 00:00:00 of next day).
            // Only for Duration times, not Moment times.
            var dayHours = 0;
            if (moment.isDuration(time)) {
                dayHours = Math.floor(time.asDays()) * 24;
            }

            // We need to set the individual fields.
            // Can't use startOf('day') then add duration. In case of DST at start of day.
            return this.hours(dayHours + time.hours())
			.minutes(time.minutes())
			.seconds(time.seconds())
			.milliseconds(time.milliseconds());
        }
    };

    // Converts the moment to UTC, stripping out its time-of-day and timezone offset,
    // but preserving its YMD. A moment with a stripped time will display no time
    // nor timezone offset when .format() is called.
    FCMoment.prototype.stripTime = function () {
        var a = this.toArray(); // year,month,date,hours,minutes,seconds as an array

        // set the internal UTC flag
        moment.fn.utc.call(this); // call the original method, because we don't want to affect _ambigZone

        this.year(a[0]) // TODO: find a way to do this in one shot
		.month(a[1])
		.date(a[2])
		.hours(0)
		.minutes(0)
		.seconds(0)
		.milliseconds(0);

        // Mark the time as ambiguous. This needs to happen after the .utc() call, which calls .zone(), which
        // clears all ambig flags. Same concept with the .year/month/date calls in the case of moment-timezone.
        this._ambigTime = true;
        this._ambigZone = true; // if ambiguous time, also ambiguous timezone offset

        return this; // for chaining
    };

    // Returns if the moment has a non-ambiguous time (boolean)
    FCMoment.prototype.hasTime = function () {
        return !this._ambigTime;
    };


    // Timezone
    // -------------------------------------------------------------------------------------------------

    // Converts the moment to UTC, stripping out its timezone offset, but preserving its
    // YMD and time-of-day. A moment with a stripped timezone offset will display no
    // timezone offset when .format() is called.
    FCMoment.prototype.stripZone = function () {
        var a = this.toArray(); // year,month,date,hours,minutes,seconds as an array
        var wasAmbigTime = this._ambigTime;

        moment.fn.utc.call(this); // set the internal UTC flag

        this.year(a[0]) // TODO: find a way to do this in one shot
		.month(a[1])
		.date(a[2])
		.hours(a[3])
		.minutes(a[4])
		.seconds(a[5])
		.milliseconds(a[6]);

        if (wasAmbigTime) {
            // the above call to .utc()/.zone() unfortunately clears the ambig flags, so reassign
            this._ambigTime = true;
        }

        // Mark the zone as ambiguous. This needs to happen after the .utc() call, which calls .zone(), which
        // clears all ambig flags. Same concept with the .year/month/date calls in the case of moment-timezone.
        this._ambigZone = true;

        return this; // for chaining
    };

    // Returns of the moment has a non-ambiguous timezone offset (boolean)
    FCMoment.prototype.hasZone = function () {
        return !this._ambigZone;
    };

    // this method implicitly marks a zone
    FCMoment.prototype.zone = function (tzo) {

        if (tzo != null) {
            // FYI, the delete statements need to be before the .zone() call or else chaos ensues
            // for reasons I don't understand.
            delete this._ambigTime;
            delete this._ambigZone;
        }

        return moment.fn.zone.apply(this, arguments);
    };

    // this method implicitly marks a zone
    FCMoment.prototype.local = function () {
        var a = this.toArray(); // year,month,date,hours,minutes,seconds as an array
        var wasAmbigZone = this._ambigZone;

        // will happen anyway via .local()/.zone(), but don't want to rely on internal implementation
        delete this._ambigTime;
        delete this._ambigZone;

        moment.fn.local.apply(this, arguments);

        if (wasAmbigZone) {
            // If the moment was ambiguously zoned, the date fields were stored as UTC.
            // We want to preserve these, but in local time.
            this.year(a[0]) // TODO: find a way to do this in one shot
			.month(a[1])
			.date(a[2])
			.hours(a[3])
			.minutes(a[4])
			.seconds(a[5])
			.milliseconds(a[6]);
        }

        return this; // for chaining
    };

    // this method implicitly marks a zone
    FCMoment.prototype.utc = function () {

        // will happen anyway via .local()/.zone(), but don't want to rely on internal implementation
        delete this._ambigTime;
        delete this._ambigZone;

        return moment.fn.utc.apply(this, arguments);
    };


    // Formatting
    // -------------------------------------------------------------------------------------------------

    FCMoment.prototype.format = function () {
        if (arguments[0]) {
            return formatDate(this, arguments[0]); // our extended formatting
        }
        if (this._ambigTime) {
            return momentFormat(this, 'YYYY-MM-DD');
        }
        if (this._ambigZone) {
            return momentFormat(this, 'YYYY-MM-DD[T]HH:mm:ss');
        }
        return momentFormat(this); // default moment original formatting
    };

    FCMoment.prototype.toISOString = function () {
        if (this._ambigTime) {
            return momentFormat(this, 'YYYY-MM-DD');
        }
        if (this._ambigZone) {
            return momentFormat(this, 'YYYY-MM-DD[T]HH:mm:ss');
        }
        return moment.fn.toISOString.apply(this, arguments);
    };


    // Querying
    // -------------------------------------------------------------------------------------------------

    // Is the moment within the specified range? `end` is exclusive.
    FCMoment.prototype.isWithin = function (start, end) {
        var a = commonlyAmbiguate([this, start, end]);
        return a[0] >= a[1] && a[0] < a[2];
    };

    // When isSame is called with units, timezone ambiguity is normalized before the comparison happens.
    // If no units are specified, the two moments must be identically the same, with matching ambig flags.
    FCMoment.prototype.isSame = function (input, units) {
        var a;

        if (units) {
            a = commonlyAmbiguate([this, input], true); // normalize timezones but don't erase times
            return moment.fn.isSame.call(a[0], a[1], units);
        }
        else {
            input = fc.moment.parseZone(input); // normalize input
            return moment.fn.isSame.call(this, input) &&
			Boolean(this._ambigTime) === Boolean(input._ambigTime) &&
			Boolean(this._ambigZone) === Boolean(input._ambigZone);
        }
    };

    // Make these query methods work with ambiguous moments
    $.each([
	'isBefore',
	'isAfter'
], function (i, methodName) {
    FCMoment.prototype[methodName] = function (input, units) {
        var a = commonlyAmbiguate([this, input]);
        return moment.fn[methodName].call(a[0], a[1], units);
    };
});


    // Misc Internals
    // -------------------------------------------------------------------------------------------------

    // given an array of moment-like inputs, return a parallel array w/ moments similarly ambiguated.
    // for example, of one moment has ambig time, but not others, all moments will have their time stripped.
    // set `preserveTime` to `true` to keep times, but only normalize zone ambiguity.
    function commonlyAmbiguate(inputs, preserveTime) {
        var outputs = [];
        var anyAmbigTime = false;
        var anyAmbigZone = false;
        var i;

        for (i = 0; i < inputs.length; i++) {
            outputs.push(fc.moment.parseZone(inputs[i]));
            anyAmbigTime = anyAmbigTime || outputs[i]._ambigTime;
            anyAmbigZone = anyAmbigZone || outputs[i]._ambigZone;
        }

        for (i = 0; i < outputs.length; i++) {
            if (anyAmbigTime && !preserveTime) {
                outputs[i].stripTime();
            }
            else if (anyAmbigZone) {
                outputs[i].stripZone();
            }
        }

        return outputs;
    }

    ; ;

    // Single Date Formatting
    // -------------------------------------------------------------------------------------------------


    // call this if you want Moment's original format method to be used
    function momentFormat(mom, formatStr) {
        return moment.fn.format.call(mom, formatStr);
    }


    // Formats `date` with a Moment formatting string, but allow our non-zero areas and
    // additional token.
    function formatDate(date, formatStr) {
        return formatDateWithChunks(date, getFormatStringChunks(formatStr));
    }


    function formatDateWithChunks(date, chunks) {
        var s = '';
        var i;

        for (i = 0; i < chunks.length; i++) {
            s += formatDateWithChunk(date, chunks[i]);
        }

        return s;
    }


    // addition formatting tokens we want recognized
    var tokenOverrides = {
        t: function (date) { // "a" or "p"
            return momentFormat(date, 'a').charAt(0);
        },
        T: function (date) { // "A" or "P"
            return momentFormat(date, 'A').charAt(0);
        }
    };


    function formatDateWithChunk(date, chunk) {
        var token;
        var maybeStr;

        if (typeof chunk === 'string') { // a literal string
            return chunk;
        }
        else if ((token = chunk.token)) { // a token, like "YYYY"
            if (tokenOverrides[token]) {
                return tokenOverrides[token](date); // use our custom token
            }
            return momentFormat(date, token);
        }
        else if (chunk.maybe) { // a grouping of other chunks that must be non-zero
            maybeStr = formatDateWithChunks(date, chunk.maybe);
            if (maybeStr.match(/[1-9]/)) {
                return maybeStr;
            }
        }

        return '';
    }


    // Date Range Formatting
    // -------------------------------------------------------------------------------------------------
    // TODO: make it work with timezone offset

    // Using a formatting string meant for a single date, generate a range string, like
    // "Sep 2 - 9 2013", that intelligently inserts a separator where the dates differ.
    // If the dates are the same as far as the format string is concerned, just return a single
    // rendering of one date, without any separator.
    function formatRange(date1, date2, formatStr, separator, isRTL) {
        var localeData;

        date1 = fc.moment.parseZone(date1);
        date2 = fc.moment.parseZone(date2);

        localeData = (date1.localeData || date1.lang).call(date1); // works with moment-pre-2.8

        // Expand localized format strings, like "LL" -> "MMMM D YYYY"
        formatStr = localeData.longDateFormat(formatStr) || formatStr;
        // BTW, this is not important for `formatDate` because it is impossible to put custom tokens
        // or non-zero areas in Moment's localized format strings.

        separator = separator || ' - ';

        return formatRangeWithChunks(
		date1,
		date2,
		getFormatStringChunks(formatStr),
		separator,
		isRTL
	);
    }
    fc.formatRange = formatRange; // expose


    function formatRangeWithChunks(date1, date2, chunks, separator, isRTL) {
        var chunkStr; // the rendering of the chunk
        var leftI;
        var leftStr = '';
        var rightI;
        var rightStr = '';
        var middleI;
        var middleStr1 = '';
        var middleStr2 = '';
        var middleStr = '';

        // Start at the leftmost side of the formatting string and continue until you hit a token
        // that is not the same between dates.
        for (leftI = 0; leftI < chunks.length; leftI++) {
            chunkStr = formatSimilarChunk(date1, date2, chunks[leftI]);
            if (chunkStr === false) {
                break;
            }
            leftStr += chunkStr;
        }

        // Similarly, start at the rightmost side of the formatting string and move left
        for (rightI = chunks.length - 1; rightI > leftI; rightI--) {
            chunkStr = formatSimilarChunk(date1, date2, chunks[rightI]);
            if (chunkStr === false) {
                break;
            }
            rightStr = chunkStr + rightStr;
        }

        // The area in the middle is different for both of the dates.
        // Collect them distinctly so we can jam them together later.
        for (middleI = leftI; middleI <= rightI; middleI++) {
            middleStr1 += formatDateWithChunk(date1, chunks[middleI]);
            middleStr2 += formatDateWithChunk(date2, chunks[middleI]);
        }

        if (middleStr1 || middleStr2) {
            if (isRTL) {
                middleStr = middleStr2 + separator + middleStr1;
            }
            else {
                middleStr = middleStr1 + separator + middleStr2;
            }
        }

        return leftStr + middleStr + rightStr;
    }


    var similarUnitMap = {
        Y: 'year',
        M: 'month',
        D: 'day', // day of month
        d: 'day', // day of week
        // prevents a separator between anything time-related...
        A: 'second', // AM/PM
        a: 'second', // am/pm
        T: 'second', // A/P
        t: 'second', // a/p
        H: 'second', // hour (24)
        h: 'second', // hour (12)
        m: 'second', // minute
        s: 'second' // second
    };
    // TODO: week maybe?


    // Given a formatting chunk, and given that both dates are similar in the regard the
    // formatting chunk is concerned, format date1 against `chunk`. Otherwise, return `false`.
    function formatSimilarChunk(date1, date2, chunk) {
        var token;
        var unit;

        if (typeof chunk === 'string') { // a literal string
            return chunk;
        }
        else if ((token = chunk.token)) {
            unit = similarUnitMap[token.charAt(0)];
            // are the dates the same for this unit of measurement?
            if (unit && date1.isSame(date2, unit)) {
                return momentFormat(date1, token); // would be the same if we used `date2`
                // BTW, don't support custom tokens
            }
        }

        return false; // the chunk is NOT the same for the two dates
        // BTW, don't support splitting on non-zero areas
    }


    // Chunking Utils
    // -------------------------------------------------------------------------------------------------


    var formatStringChunkCache = {};


    function getFormatStringChunks(formatStr) {
        if (formatStr in formatStringChunkCache) {
            return formatStringChunkCache[formatStr];
        }
        return (formatStringChunkCache[formatStr] = chunkFormatString(formatStr));
    }


    // Break the formatting string into an array of chunks
    function chunkFormatString(formatStr) {
        var chunks = [];
        var chunker = /\[([^\]]*)\]|\(([^\)]*)\)|(LT|(\w)\4*o?)|([^\w\[\(]+)/g; // TODO: more descrimination
        var match;

        while ((match = chunker.exec(formatStr))) {
            if (match[1]) { // a literal string inside [ ... ]
                chunks.push(match[1]);
            }
            else if (match[2]) { // non-zero formatting inside ( ... )
                chunks.push({ maybe: chunkFormatString(match[2]) });
            }
            else if (match[3]) { // a formatting token
                chunks.push({ token: match[3] });
            }
            else if (match[5]) { // an unenclosed literal string
                chunks.push(match[5]);
            }
        }

        return chunks;
    }

    ; ;

    /* A rectangular panel that is absolutely positioned over other content
    ------------------------------------------------------------------------------------------------------------------------
    Options:
    - className (string)
    - content (HTML string or jQuery element set)
    - parentEl
    - top
    - left
    - right (the x coord of where the right edge should be. not a "CSS" right)
    - autoHide (boolean)
    - show (callback)
    - hide (callback)
    */

    function Popover(options) {
        this.options = options || {};
    }


    Popover.prototype = {

        isHidden: true,
        options: null,
        el: null, // the container element for the popover. generated by this object
        documentMousedownProxy: null, // document mousedown handler bound to `this`
        margin: 10, // the space required between the popover and the edges of the scroll container


        // Shows the popover on the specified position. Renders it if not already
        show: function () {
            if (this.isHidden) {
                if (!this.el) {
                    this.render();
                }
                this.el.show();
                this.position();
                this.isHidden = false;
                this.trigger('show');
            }
        },


        // Hides the popover, through CSS, but does not remove it from the DOM
        hide: function () {
            if (!this.isHidden) {
                this.el.hide();
                this.isHidden = true;
                this.trigger('hide');
            }
        },


        // Creates `this.el` and renders content inside of it
        render: function () {
            var _this = this;
            var options = this.options;

            this.el = $('<div class="fc-popover"/>')
			.addClass(options.className || '')
			.css({
			    // position initially to the top left to avoid creating scrollbars
			    top: 0,
			    left: 0
			})
			.append(options.content)
			.appendTo(options.parentEl);

            // when a click happens on anything inside with a 'fc-close' className, hide the popover
            this.el.on('click', '.fc-close', function () {
                _this.hide();
            });

            if (options.autoHide) {
                $(document).on('mousedown', this.documentMousedownProxy = $.proxy(this, 'documentMousedown'));
            }
        },


        // Triggered when the user clicks *anywhere* in the document, for the autoHide feature
        documentMousedown: function (ev) {
            // only hide the popover if the click happened outside the popover
            if (this.el && !$(ev.target).closest(this.el).length) {
                this.hide();
            }
        },


        // Hides and unregisters any handlers
        destroy: function () {
            this.hide();

            if (this.el) {
                this.el.remove();
                this.el = null;
            }

            $(document).off('mousedown', this.documentMousedownProxy);
        },


        // Positions the popover optimally, using the top/left/right options
        position: function () {
            var options = this.options;
            var origin = this.el.offsetParent().offset();
            var width = this.el.outerWidth();
            var height = this.el.outerHeight();
            var windowEl = $(window);
            var viewportEl = getScrollParent(this.el);
            var viewportTop;
            var viewportLeft;
            var viewportOffset;
            var top; // the "position" (not "offset") values for the popover
            var left; //

            // compute top and left
            top = options.top || 0;
            if (options.left !== undefined) {
                left = options.left;
            }
            else if (options.right !== undefined) {
                left = options.right - width; // derive the left value from the right value
            }
            else {
                left = 0;
            }

            if (viewportEl.is(window) || viewportEl.is(document)) { // normalize getScrollParent's result
                viewportEl = windowEl;
                viewportTop = 0; // the window is always at the top left
                viewportLeft = 0; // (and .offset() won't work if called here)
            }
            else {
                viewportOffset = viewportEl.offset();
                viewportTop = viewportOffset.top;
                viewportLeft = viewportOffset.left;
            }

            // if the window is scrolled, it causes the visible area to be further down
            viewportTop += windowEl.scrollTop();
            viewportLeft += windowEl.scrollLeft();

            // constrain to the view port. if constrained by two edges, give precedence to top/left
            if (options.viewportConstrain !== false) {
                top = Math.min(top, viewportTop + viewportEl.outerHeight() - height - this.margin);
                top = Math.max(top, viewportTop + this.margin);
                left = Math.min(left, viewportLeft + viewportEl.outerWidth() - width - this.margin);
                left = Math.max(left, viewportLeft + this.margin);
            }

            this.el.css({
                top: top - origin.top,
                left: left - origin.left
            });
        },


        // Triggers a callback. Calls a function in the option hash of the same name.
        // Arguments beyond the first `name` are forwarded on.
        // TODO: better code reuse for this. Repeat code
        trigger: function (name) {
            if (this.options[name]) {
                this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
            }
        }

    };

    ; ;

    /* A "coordinate map" converts pixel coordinates into an associated cell, which has an associated date
    ------------------------------------------------------------------------------------------------------------------------
    Common interface:

    CoordMap.prototype = {
    build: function() {},
    getCell: function(x, y) {}
    };

    */

    /* Coordinate map for a grid component
    ----------------------------------------------------------------------------------------------------------------------*/

    function GridCoordMap(grid) {
        this.grid = grid;
    }


    GridCoordMap.prototype = {

        grid: null, // reference to the Grid
        rows: null, // the top-to-bottom y coordinates. including the bottom of the last item
        cols: null, // the left-to-right x coordinates. including the right of the last item

        containerEl: null, // container element that all coordinates are constrained to. optionally assigned
        minX: null,
        maxX: null, // exclusive
        minY: null,
        maxY: null, // exclusive


        // Queries the grid for the coordinates of all the cells
        build: function () {
            this.grid.buildCoords(
			this.rows = [],
			this.cols = []
		);
            this.computeBounds();
        },


        // Given a coordinate of the document, gets the associated cell. If no cell is underneath, returns null
        getCell: function (x, y) {
            var cell = null;
            var rows = this.rows;
            var cols = this.cols;
            var r = -1;
            var c = -1;
            var i;

            if (this.inBounds(x, y)) {

                for (i = 0; i < rows.length; i++) {
                    if (y >= rows[i][0] && y < rows[i][1]) {
                        r = i;
                        break;
                    }
                }

                for (i = 0; i < cols.length; i++) {
                    if (x >= cols[i][0] && x < cols[i][1]) {
                        c = i;
                        break;
                    }
                }

                if (r >= 0 && c >= 0) {
                    cell = { row: r, col: c };
                    cell.grid = this.grid;
                    cell.date = this.grid.getCellDate(cell);
                }
            }

            return cell;
        },


        // If there is a containerEl, compute the bounds into min/max values
        computeBounds: function () {
            var containerOffset;

            if (this.containerEl) {
                containerOffset = this.containerEl.offset();
                this.minX = containerOffset.left;
                this.maxX = containerOffset.left + this.containerEl.outerWidth();
                this.minY = containerOffset.top;
                this.maxY = containerOffset.top + this.containerEl.outerHeight();
            }
        },


        // Determines if the given coordinates are in bounds. If no `containerEl`, always true
        inBounds: function (x, y) {
            if (this.containerEl) {
                return x >= this.minX && x < this.maxX && y >= this.minY && y < this.maxY;
            }
            return true;
        }

    };


    /* Coordinate map that is a combination of multiple other coordinate maps
    ----------------------------------------------------------------------------------------------------------------------*/

    function ComboCoordMap(coordMaps) {
        this.coordMaps = coordMaps;
    }


    ComboCoordMap.prototype = {

        coordMaps: null, // an array of CoordMaps


        // Builds all coordMaps
        build: function () {
            var coordMaps = this.coordMaps;
            var i;

            for (i = 0; i < coordMaps.length; i++) {
                coordMaps[i].build();
            }
        },


        // Queries all coordMaps for the cell underneath the given coordinates, returning the first result
        getCell: function (x, y) {
            var coordMaps = this.coordMaps;
            var cell = null;
            var i;

            for (i = 0; i < coordMaps.length && !cell; i++) {
                cell = coordMaps[i].getCell(x, y);
            }

            return cell;
        }

    };

    ; ;

    /* Tracks mouse movements over a CoordMap and raises events about which cell the mouse is over.
    ----------------------------------------------------------------------------------------------------------------------*/
    // TODO: implement scrolling

    function DragListener(coordMap, options) {
        this.coordMap = coordMap;
        this.options = options || {};
    }


    DragListener.prototype = {

        coordMap: null,
        options: null,

        isListening: false,
        isDragging: false,

        // the cell/date the mouse was over when listening started
        origCell: null,
        origDate: null,

        // the cell/date the mouse is over
        cell: null,
        date: null,

        // coordinates of the initial mousedown
        mouseX0: null,
        mouseY0: null,

        // handler attached to the document, bound to the DragListener's `this`
        mousemoveProxy: null,
        mouseupProxy: null,

        scrollEl: null,
        scrollBounds: null, // { top, bottom, left, right }
        scrollTopVel: null, // pixels per second
        scrollLeftVel: null, // pixels per second
        scrollIntervalId: null, // ID of setTimeout for scrolling animation loop
        scrollHandlerProxy: null, // this-scoped function for handling when scrollEl is scrolled

        scrollSensitivity: 30, // pixels from edge for scrolling to start
        scrollSpeed: 200, // pixels per second, at maximum speed
        scrollIntervalMs: 50, // millisecond wait between scroll increment


        // Call this when the user does a mousedown. Will probably lead to startListening
        mousedown: function (ev) {
            if (isPrimaryMouseButton(ev)) {

                ev.preventDefault(); // prevents native selection in most browsers

                this.startListening(ev);

                // start the drag immediately if there is no minimum distance for a drag start
                if (!this.options.distance) {
                    this.startDrag(ev);
                }
            }
        },


        // Call this to start tracking mouse movements
        startListening: function (ev) {
            var scrollParent;
            var cell;

            if (!this.isListening) {

                // grab scroll container and attach handler
                if (ev && this.options.scroll) {
                    scrollParent = getScrollParent($(ev.target));
                    if (!scrollParent.is(window) && !scrollParent.is(document)) {
                        this.scrollEl = scrollParent;

                        // scope to `this`, and use `debounce` to make sure rapid calls don't happen
                        this.scrollHandlerProxy = debounce($.proxy(this, 'scrollHandler'), 100);
                        this.scrollEl.on('scroll', this.scrollHandlerProxy);
                    }
                }

                this.computeCoords(); // relies on `scrollEl`

                // get info on the initial cell, date, and coordinates
                if (ev) {
                    cell = this.getCell(ev);
                    this.origCell = cell;
                    this.origDate = cell ? cell.date : null;

                    this.mouseX0 = ev.pageX;
                    this.mouseY0 = ev.pageY;
                }

                $(document)
				.on('mousemove', this.mousemoveProxy = $.proxy(this, 'mousemove'))
				.on('mouseup', this.mouseupProxy = $.proxy(this, 'mouseup'))
				.on('selectstart', this.preventDefault); // prevents native selection in IE<=8

                this.isListening = true;
                this.trigger('listenStart', ev);
            }
        },


        // Recomputes the drag-critical positions of elements
        computeCoords: function () {
            this.coordMap.build();
            this.computeScrollBounds();
        },


        // Called when the user moves the mouse
        mousemove: function (ev) {
            var minDistance;
            var distanceSq; // current distance from mouseX0/mouseY0, squared

            if (!this.isDragging) { // if not already dragging...
                // then start the drag if the minimum distance criteria is met
                minDistance = this.options.distance || 1;
                distanceSq = Math.pow(ev.pageX - this.mouseX0, 2) + Math.pow(ev.pageY - this.mouseY0, 2);
                if (distanceSq >= minDistance * minDistance) { // use pythagorean theorem
                    this.startDrag(ev);
                }
            }

            if (this.isDragging) {
                this.drag(ev); // report a drag, even if this mousemove initiated the drag
            }
        },


        // Call this to initiate a legitimate drag.
        // This function is called internally from this class, but can also be called explicitly from outside
        startDrag: function (ev) {
            var cell;

            if (!this.isListening) { // startDrag must have manually initiated
                this.startListening();
            }

            if (!this.isDragging) {
                this.isDragging = true;
                this.trigger('dragStart', ev);

                // report the initial cell the mouse is over
                cell = this.getCell(ev);
                if (cell) {
                    this.cellOver(cell, true);
                }
            }
        },


        // Called while the mouse is being moved and when we know a legitimate drag is taking place
        drag: function (ev) {
            var cell;

            if (this.isDragging) {
                cell = this.getCell(ev);

                if (!isCellsEqual(cell, this.cell)) { // a different cell than before?
                    if (this.cell) {
                        this.cellOut();
                    }
                    if (cell) {
                        this.cellOver(cell);
                    }
                }

                this.dragScroll(ev); // will possibly cause scrolling
            }
        },


        // Called when a the mouse has just moved over a new cell
        cellOver: function (cell) {
            this.cell = cell;
            this.date = cell.date;
            this.trigger('cellOver', cell, cell.date);
        },


        // Called when the mouse has just moved out of a cell
        cellOut: function () {
            if (this.cell) {
                this.trigger('cellOut', this.cell);
                this.cell = null;
                this.date = null;
            }
        },


        // Called when the user does a mouseup
        mouseup: function (ev) {
            this.stopDrag(ev);
            this.stopListening(ev);
        },


        // Called when the drag is over. Will not cause listening to stop however.
        // A concluding 'cellOut' event will NOT be triggered.
        stopDrag: function (ev) {
            if (this.isDragging) {
                this.stopScrolling();
                this.trigger('dragStop', ev);
                this.isDragging = false;
            }
        },


        // Call this to stop listening to the user's mouse events
        stopListening: function (ev) {
            if (this.isListening) {

                // remove the scroll handler if there is a scrollEl
                if (this.scrollEl) {
                    this.scrollEl.off('scroll', this.scrollHandlerProxy);
                    this.scrollHandlerProxy = null;
                }

                $(document)
				.off('mousemove', this.mousemoveProxy)
				.off('mouseup', this.mouseupProxy)
				.off('selectstart', this.preventDefault);

                this.mousemoveProxy = null;
                this.mouseupProxy = null;

                this.isListening = false;
                this.trigger('listenStop', ev);

                this.origCell = this.cell = null;
                this.origDate = this.date = null;
            }
        },


        // Gets the cell underneath the coordinates for the given mouse event
        getCell: function (ev) {
            return this.coordMap.getCell(ev.pageX, ev.pageY);
        },


        // Triggers a callback. Calls a function in the option hash of the same name.
        // Arguments beyond the first `name` are forwarded on.
        trigger: function (name) {
            if (this.options[name]) {
                this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
            }
        },


        // Stops a given mouse event from doing it's native browser action. In our case, text selection.
        preventDefault: function (ev) {
            ev.preventDefault();
        },


        /* Scrolling
        ------------------------------------------------------------------------------------------------------------------*/


        // Computes and stores the bounding rectangle of scrollEl
        computeScrollBounds: function () {
            var el = this.scrollEl;
            var offset;

            if (el) {
                offset = el.offset();
                this.scrollBounds = {
                    top: offset.top,
                    left: offset.left,
                    bottom: offset.top + el.outerHeight(),
                    right: offset.left + el.outerWidth()
                };
            }
        },


        // Called when the dragging is in progress and scrolling should be updated
        dragScroll: function (ev) {
            var sensitivity = this.scrollSensitivity;
            var bounds = this.scrollBounds;
            var topCloseness, bottomCloseness;
            var leftCloseness, rightCloseness;
            var topVel = 0;
            var leftVel = 0;

            if (bounds) { // only scroll if scrollEl exists

                // compute closeness to edges. valid range is from 0.0 - 1.0
                topCloseness = (sensitivity - (ev.pageY - bounds.top)) / sensitivity;
                bottomCloseness = (sensitivity - (bounds.bottom - ev.pageY)) / sensitivity;
                leftCloseness = (sensitivity - (ev.pageX - bounds.left)) / sensitivity;
                rightCloseness = (sensitivity - (bounds.right - ev.pageX)) / sensitivity;

                // translate vertical closeness into velocity.
                // mouse must be completely in bounds for velocity to happen.
                if (topCloseness >= 0 && topCloseness <= 1) {
                    topVel = topCloseness * this.scrollSpeed * -1; // negative. for scrolling up
                }
                else if (bottomCloseness >= 0 && bottomCloseness <= 1) {
                    topVel = bottomCloseness * this.scrollSpeed;
                }

                // translate horizontal closeness into velocity
                if (leftCloseness >= 0 && leftCloseness <= 1) {
                    leftVel = leftCloseness * this.scrollSpeed * -1; // negative. for scrolling left
                }
                else if (rightCloseness >= 0 && rightCloseness <= 1) {
                    leftVel = rightCloseness * this.scrollSpeed;
                }
            }

            this.setScrollVel(topVel, leftVel);
        },


        // Sets the speed-of-scrolling for the scrollEl
        setScrollVel: function (topVel, leftVel) {

            this.scrollTopVel = topVel;
            this.scrollLeftVel = leftVel;

            this.constrainScrollVel(); // massages into realistic values

            // if there is non-zero velocity, and an animation loop hasn't already started, then START
            if ((this.scrollTopVel || this.scrollLeftVel) && !this.scrollIntervalId) {
                this.scrollIntervalId = setInterval(
				$.proxy(this, 'scrollIntervalFunc'), // scope to `this`
				this.scrollIntervalMs
			);
            }
        },


        // Forces scrollTopVel and scrollLeftVel to be zero if scrolling has already gone all the way
        constrainScrollVel: function () {
            var el = this.scrollEl;

            if (this.scrollTopVel < 0) { // scrolling up?
                if (el.scrollTop() <= 0) { // already scrolled all the way up?
                    this.scrollTopVel = 0;
                }
            }
            else if (this.scrollTopVel > 0) { // scrolling down?
                if (el.scrollTop() + el[0].clientHeight >= el[0].scrollHeight) { // already scrolled all the way down?
                    this.scrollTopVel = 0;
                }
            }

            if (this.scrollLeftVel < 0) { // scrolling left?
                if (el.scrollLeft() <= 0) { // already scrolled all the left?
                    this.scrollLeftVel = 0;
                }
            }
            else if (this.scrollLeftVel > 0) { // scrolling right?
                if (el.scrollLeft() + el[0].clientWidth >= el[0].scrollWidth) { // already scrolled all the way right?
                    this.scrollLeftVel = 0;
                }
            }
        },


        // This function gets called during every iteration of the scrolling animation loop
        scrollIntervalFunc: function () {
            var el = this.scrollEl;
            var frac = this.scrollIntervalMs / 1000; // considering animation frequency, what the vel should be mult'd by

            // change the value of scrollEl's scroll
            if (this.scrollTopVel) {
                el.scrollTop(el.scrollTop() + this.scrollTopVel * frac);
            }
            if (this.scrollLeftVel) {
                el.scrollLeft(el.scrollLeft() + this.scrollLeftVel * frac);
            }

            this.constrainScrollVel(); // since the scroll values changed, recompute the velocities

            // if scrolled all the way, which causes the vels to be zero, stop the animation loop
            if (!this.scrollTopVel && !this.scrollLeftVel) {
                this.stopScrolling();
            }
        },


        // Kills any existing scrolling animation loop
        stopScrolling: function () {
            if (this.scrollIntervalId) {
                clearInterval(this.scrollIntervalId);
                this.scrollIntervalId = null;

                // when all done with scrolling, recompute positions since they probably changed
                this.computeCoords();
            }
        },


        // Get called when the scrollEl is scrolled (NOTE: this is delayed via debounce)
        scrollHandler: function () {
            // recompute all coordinates, but *only* if this is *not* part of our scrolling animation
            if (!this.scrollIntervalId) {
                this.computeCoords();
            }
        }

    };


    // Returns `true` if the cells are identically equal. `false` otherwise.
    // They must have the same row, col, and be from the same grid.
    // Two null values will be considered equal, as two "out of the grid" states are the same.
    function isCellsEqual(cell1, cell2) {

        if (!cell1 && !cell2) {
            return true;
        }

        if (cell1 && cell2) {
            return cell1.grid === cell2.grid &&
			cell1.row === cell2.row &&
			cell1.col === cell2.col;
        }

        return false;
    }

    ; ;

    /* Creates a clone of an element and lets it track the mouse as it moves
    ----------------------------------------------------------------------------------------------------------------------*/

    function MouseFollower(sourceEl, options) {
        this.options = options = options || {};
        this.sourceEl = sourceEl;
        this.parentEl = options.parentEl ? $(options.parentEl) : sourceEl.parent(); // default to sourceEl's parent
    }


    MouseFollower.prototype = {

        options: null,

        sourceEl: null, // the element that will be cloned and made to look like it is dragging
        el: null, // the clone of `sourceEl` that will track the mouse
        parentEl: null, // the element that `el` (the clone) will be attached to

        // the initial position of el, relative to the offset parent. made to match the initial offset of sourceEl
        top0: null,
        left0: null,

        // the initial position of the mouse
        mouseY0: null,
        mouseX0: null,

        // the number of pixels the mouse has moved from its initial position
        topDelta: null,
        leftDelta: null,

        mousemoveProxy: null, // document mousemove handler, bound to the MouseFollower's `this`

        isFollowing: false,
        isHidden: false,
        isAnimating: false, // doing the revert animation?


        // Causes the element to start following the mouse
        start: function (ev) {
            if (!this.isFollowing) {
                this.isFollowing = true;

                this.mouseY0 = ev.pageY;
                this.mouseX0 = ev.pageX;
                this.topDelta = 0;
                this.leftDelta = 0;

                if (!this.isHidden) {
                    this.updatePosition();
                }

                $(document).on('mousemove', this.mousemoveProxy = $.proxy(this, 'mousemove'));
            }
        },


        // Causes the element to stop following the mouse. If shouldRevert is true, will animate back to original position.
        // `callback` gets invoked when the animation is complete. If no animation, it is invoked immediately.
        stop: function (shouldRevert, callback) {
            var _this = this;
            var revertDuration = this.options.revertDuration;

            function complete() {
                _this.isAnimating = false;
                _this.destroyEl();

                _this.top0 = _this.left0 = null; // reset state for future updatePosition calls

                if (callback) {
                    callback();
                }
            }

            if (this.isFollowing && !this.isAnimating) { // disallow more than one stop animation at a time
                _this.isFollowing = false;

                $(document).off('mousemove', _this.mousemoveProxy);

                if (shouldRevert && revertDuration && !this.isHidden) { // do a revert animation?
                    var calendarMonthTop = window.localStorage.getItem("lastView") === 'month' ? $(".fc-view.fc-month-view").scrollTop() : 0, calendarMonthLeft = 0;
                    if (window.localStorage.getItem("lastView") === 'month' && $.browser.safari) {
                        calendarMonthTop = 0;
                        calendarMonthLeft = 250;
                    }

                    _this.isAnimating = true;
                    _this.el.animate({
                        top: _this.top0 + calendarMonthTop,
                        left: _this.left0 - calendarMonthLeft
                    }, {
                        duration: revertDuration,
                        complete: complete
                    });
                }
                else {
                    complete();
                }
            }
        },


        // Gets the tracking element. Create it if necessary
        getEl: function () {
            var el = this.el;

            if (!el) {
                this.sourceEl.width(); // hack to force IE8 to compute correct bounding box
                el = this.el = this.sourceEl.clone()
				.css({
				    position: 'absolute',
				    visibility: '', // in case original element was hidden (commonly through hideEvents())
				    display: this.isHidden ? 'none' : '', // for when initially hidden
				    margin: 0,
				    right: 'auto', // erase and set width instead
				    bottom: 'auto', // erase and set height instead
				    width: this.sourceEl.width(), // explicit height in case there was a 'right' value
				    height: this.sourceEl.height(), // explicit width in case there was a 'bottom' value
				    opacity: this.options.opacity || '',
				    zIndex: this.options.zIndex
				})
				.appendTo(this.parentEl);
            }

            return el;
        },


        // Removes the tracking element if it has already been created
        destroyEl: function () {
            if (this.el) {
                this.el.remove();
                this.el = null;
            }
        },


        // Update the CSS position of the tracking element
        updatePosition: function () {
            var sourceOffset;
            var origin;

            this.getEl(); // ensure this.el

            // make sure origin info was computed
            if (this.top0 === null) {
                this.sourceEl.width(); // hack to force IE8 to compute correct bounding box
                sourceOffset = this.sourceEl.offset();
                origin = this.el.offsetParent().offset();
                this.top0 = sourceOffset.top - origin.top;
                this.left0 = sourceOffset.left - origin.left;
            }

            this.el.css({
                top: this.top0 + this.topDelta,
                left: this.left0 + this.leftDelta
            });
        },


        // Gets called when the user moves the mouse
        mousemove: function (ev) {
            var calendarMonthTop = window.localStorage.getItem("lastView") === 'month' ? $(".fc-view.fc-month-view").scrollTop() : 0, calendarMonthLeft = 0;
            if (window.localStorage.getItem("lastView") === 'month' && $.browser.safari) {
                calendarMonthTop = 0;
                calendarMonthLeft = 250
            }

            this.topDelta = ev.pageY - this.mouseY0 + calendarMonthTop;
            this.leftDelta = ev.pageX - this.mouseX0 - calendarMonthLeft;

            if (!this.isHidden) {
                this.updatePosition();
            }
        },


        // Temporarily makes the tracking element invisible. Can be called before following starts
        hide: function () {
            if (!this.isHidden) {
                this.isHidden = true;
                if (this.el) {
                    this.el.hide();
                }
            }
        },


        // Show the tracking element after it has been temporarily hidden
        show: function () {
            if (this.isHidden) {
                this.isHidden = false;
                this.updatePosition();
                this.getEl().show();
            }
        }

    };

    ; ;

    /* A utility class for rendering <tr> rows.
    ----------------------------------------------------------------------------------------------------------------------*/
    // It leverages methods of the subclass and the View to determine custom rendering behavior for each row "type"
    // (such as highlight rows, day rows, helper rows, etc).

    function RowRenderer(view) {
        this.view = view;
    }


    RowRenderer.prototype = {

        view: null, // a View object
        cellHtml: '<td/>', // plain default HTML used for a cell when no other is available


        // Renders the HTML for a row, leveraging custom cell-HTML-renderers based on the `rowType`.
        // Also applies the "intro" and "outro" cells, which are specified by the subclass and views.
        // `row` is an optional row number.
        rowHtml: function (rowType, row) {
            var view = this.view;
            var renderCell = this.getHtmlRenderer('cell', rowType);
            var cellHtml = '';
            var col;
            var date;

            row = row || 0;

            for (col = 0; col < view.colCnt; col++) {
                date = view.cellToDate(row, col);
                cellHtml += renderCell(row, col, date);
            }

            cellHtml = this.bookendCells(cellHtml, rowType, row); // apply intro and outro

            return '<tr>' + cellHtml + '</tr>';
        },


        // Applies the "intro" and "outro" HTML to the given cells.
        // Intro means the leftmost cell when the calendar is LTR and the rightmost cell when RTL. Vice-versa for outro.
        // `cells` can be an HTML string of <td>'s or a jQuery <tr> element
        // `row` is an optional row number.
        bookendCells: function (cells, rowType, row) {
            var view = this.view;
            var intro = this.getHtmlRenderer('intro', rowType)(row || 0);
            var outro = this.getHtmlRenderer('outro', rowType)(row || 0);
            var isRTL = view.opt('isRTL');
            var prependHtml = isRTL ? outro : intro;
            var appendHtml = isRTL ? intro : outro;

            if (typeof cells === 'string') {
                return prependHtml + cells + appendHtml;
            }
            else { // a jQuery <tr> element
                return cells.prepend(prependHtml).append(appendHtml);
            }
        },


        // Returns an HTML-rendering function given a specific `rendererName` (like cell, intro, or outro) and a specific
        // `rowType` (like day, eventSkeleton, helperSkeleton), which is optional.
        // If a renderer for the specific rowType doesn't exist, it will fall back to a generic renderer.
        // We will query the View object first for any custom rendering functions, then the methods of the subclass.
        getHtmlRenderer: function (rendererName, rowType) {
            var view = this.view;
            var generalName; // like "cellHtml"
            var specificName; // like "dayCellHtml". based on rowType
            var provider; // either the View or the RowRenderer subclass, whichever provided the method
            var renderer;

            generalName = rendererName + 'Html';
            if (rowType) {
                specificName = rowType + capitaliseFirstLetter(rendererName) + 'Html';
            }

            if (specificName && (renderer = view[specificName])) {
                provider = view;
            }
            else if (specificName && (renderer = this[specificName])) {
                provider = this;
            }
            else if ((renderer = view[generalName])) {
                provider = view;
            }
            else if ((renderer = this[generalName])) {
                provider = this;
            }

            if (typeof renderer === 'function') {
                return function (row) {
                    return renderer.apply(provider, arguments) || ''; // use correct `this` and always return a string
                };
            }

            // the rendered can be a plain string as well. if not specified, always an empty string.
            return function () {
                return renderer || '';
            };
        }

    };

    ; ;

    /* An abstract class comprised of a "grid" of cells that each represent a specific datetime
    ----------------------------------------------------------------------------------------------------------------------*/

    function Grid(view) {
        RowRenderer.call(this, view); // call the super-constructor
        this.coordMap = new GridCoordMap(this);
    }


    Grid.prototype = createObject(RowRenderer.prototype); // declare the super-class
    $.extend(Grid.prototype, {

        el: null, // the containing element
        coordMap: null, // a GridCoordMap that converts pixel values to datetimes
        cellDuration: null, // a cell's duration. subclasses must assign this ASAP


        // Renders the grid into the `el` element.
        // Subclasses should override and call this super-method when done.
        render: function () {
            this.bindHandlers();
        },


        // Called when the grid's resources need to be cleaned up
        destroy: function () {
            // subclasses can implement
        },


        /* Coordinates & Cells
        ------------------------------------------------------------------------------------------------------------------*/


        // Populates the given empty arrays with the y and x coordinates of the cells
        buildCoords: function (rows, cols) {
            // subclasses must implement
        },


        // Given a cell object, returns the date for that cell
        getCellDate: function (cell) {
            // subclasses must implement
        },


        // Given a cell object, returns the element that represents the cell's whole-day
        getCellDayEl: function (cell) {
            // subclasses must implement
        },


        // Converts a range with an inclusive `start` and an exclusive `end` into an array of segment objects
        rangeToSegs: function (start, end) {
            // subclasses must implement
        },


        /* Handlers
        ------------------------------------------------------------------------------------------------------------------*/


        // Attach handlers to `this.el`, using bubbling to listen to all ancestors.
        // We don't need to undo any of this in a "destroy" method, because the view will simply remove `this.el` from the
        // DOM and jQuery will be smart enough to garbage collect the handlers.
        bindHandlers: function () {
            var _this = this;

            this.el.on('mousedown', function (ev) {
                if (
				!$(ev.target).is('.fc-more') && // not an an event element, or "more.." link .fc-event-container *
				!$(ev.target).closest('.fc-popover').length && // not on a popover (like the "more.." events one)
                $(ev.target).parents(".fc-draggable").length == 0 &&
                ($(ev.target).closest(".showActiveTitle").length == 0 || $(ev.target).closest(".fc-helper").length)
			) {
                    _this.dayMousedown(ev);
                }
            });

            if ($.browser.msie) {
                var ieVer = parseInt($.browser.version, 10);
                if (ieVer <= 8) {
                    this.el.on('dblclick', function () {
                        _this.dayMousedown(event, 1);
                    });
                }
            }

            this.bindSegHandlers(); // attach event-element-related handlers. in Grid.events.js
        },


        // Process a mousedown on an element that represents a day. For day clicking and selecting.
        dayMousedown: function (ev, ieVer) {
            var _this = this;
            var view = this.view;
            var isSelectable = view.opt('selectable');
            var dates = null; // the inclusive dates of the selection. will be null if no selection
            var start; // the inclusive start of the selection
            var end; // the *exclusive* end of the selection
            var dayEl;

            // this listener tracks a mousedown on a day element, and a subsequent drag.
            // if the drag ends on the same day, it is a 'dayClick'.
            // if 'selectable' is enabled, this listener also detects selections.
            var dragListener = new DragListener(this.coordMap, {
                //distance: 5, // needs more work if we want dayClick to fire correctly
                scroll: view.opt('dragScroll'),
                dragStart: function () {
                    view.unselect(); // since we could be rendering a new selection, we want to clear any old one
                },
                cellOver: function (cell, date) {
                    if (dragListener.origDate) { // click needs to have started on a cell

                        dayEl = _this.getCellDayEl(cell);

                        dates = [date, dragListener.origDate].sort(dateCompare);
                        start = dates[0];
                        end = dates[1].clone().add(_this.cellDuration);

                        if (isSelectable) {
                            _this.renderSelection(start, end);
                        }
                    }
                },
                cellOut: function (cell, date) {
                    dates = null;
                    _this.destroySelection();
                },
                listenStop: function (ev) {
                    if (dates) { // started and ended on a cell?
                        if (dates[0].isSame(dates[1])) {
                            view.trigger('dayClick', dayEl[0], start, ev);
                        }
                        if (isSelectable) {
                            // the selection will already have been rendered. just report it
                            view.reportSelection(start, end, ev);
                        }
                    }
                }
            });

            if (ieVer == 1) { //IE9ÒÔÏÂ·ÃÎÊ¼æÈÝ´¦Àí
                view.trigger('dayClick');
            }

            dragListener.mousedown(ev); // start listening, which will eventually initiate a dragStart
        },


        /* Event Dragging
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of a event being dragged over the given date(s).
        // `end` can be null, as well as `seg`. See View's documentation on renderDrag for more info.
        // A returned value of `true` signals that a mock "helper" event has been rendered.
        renderDrag: function (start, end, seg) {
            // subclasses must implement
        },


        // Unrenders a visual indication of an event being dragged
        destroyDrag: function () {
            // subclasses must implement
        },


        /* Event Resizing
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event being resized.
        // `start` and `end` are the updated dates of the event. `seg` is the original segment object involved in the drag.
        renderResize: function (start, end, seg) {
            // subclasses must implement
        },


        // Unrenders a visual indication of an event being resized.
        destroyResize: function () {
            // subclasses must implement
        },


        /* Event Helper
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a mock event over the given date(s).
        // `end` can be null, in which case the mock event that is rendered will have a null end time.
        // `sourceSeg` is the internal segment object involved in the drag. If null, something external is dragging.
        renderRangeHelper: function (start, end, sourceSeg) {
            var view = this.view;
            var fakeEvent;

            // compute the end time if forced to do so (this is what EventManager does)
            if (!end && view.opt('forceEventDuration')) {
                end = view.calendar.getDefaultEventEnd(!start.hasTime(), start);
            }

            fakeEvent = sourceSeg ? createObject(sourceSeg.event) : {}; // mask the original event object if possible
            fakeEvent.start = start;
            fakeEvent.end = end;
            fakeEvent.allDay = !(start.hasTime() || (end && end.hasTime())); // freshly compute allDay

            // this extra className will be useful for differentiating real events from mock events in CSS
            fakeEvent.className = (fakeEvent.className || []).concat('fc-helper');

            // if something external is being dragged in, don't render a resizer
            if (!sourceSeg) {
                fakeEvent.editable = false;
            }

            this.renderHelper(fakeEvent, sourceSeg); // do the actual rendering
        },


        // Renders a mock event
        renderHelper: function (event, sourceSeg) {
            // subclasses must implement
        },


        // Unrenders a mock event
        destroyHelper: function () {
            // subclasses must implement
        },


        /* Selection
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of a selection. Will highlight by default but can be overridden by subclasses.
        renderSelection: function (start, end) {
            this.renderHighlight(start, end);
        },


        // Unrenders any visual indications of a selection. Will unrender a highlight by default.
        destroySelection: function () {
            this.destroyHighlight();
        },


        /* Highlight
        ------------------------------------------------------------------------------------------------------------------*/


        // Puts visual emphasis on a certain date range
        renderHighlight: function (start, end) {
            // subclasses should implement
        },


        // Removes visual emphasis on a date range
        destroyHighlight: function () {
            // subclasses should implement
        },



        /* Generic rendering utilities for subclasses
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a day-of-week header row
        headHtml: function () {
            return '' +
			'<div class="fc-row ' + this.view.widgetHeaderClass + '">' +
				'<table>' +
					'<thead>' +
						this.rowHtml('head') + // leverages RowRenderer
					'</thead>' +
				'</table>' +
			'</div>';
        },


        // Used by the `headHtml` method, via RowRenderer, for rendering the HTML of a day-of-week header cell
        headCellHtml: function (row, col, date) {
            var view = this.view;
            var calendar = view.calendar;
            var colFormat = view.opt('columnFormat');

            return '' +
			'<th class="fc-day-header ' + view.widgetHeaderClass + ' fc-' + dayIDs[date.day()] + '">' +
				htmlEscape(calendar.formatDate(date, colFormat)) +
			'</th>';
        },


        // Renders the HTML for a single-day background cell
        bgCellHtml: function (row, col, date) {
            var view = this.view;
            var classes = this.getDayClasses(date);

            classes.unshift('fc-day', view.widgetContentClass);

            return '<td class="' + classes.join(' ') + '" data-date="' + date.format() + '"></td>';
        },


        // Computes HTML classNames for a single-day cell
        getDayClasses: function (date) {
            var view = this.view;
            var today = view.calendar.getNow().stripTime();
            var classes = ['fc-' + dayIDs[date.day()]];

            if (
			view.name === 'month' &&
			date.month() != view.intervalStart.month()
		) {
                classes.push('fc-other-month');
            }

            if (date.isSame(today, 'day')) {
                classes.push(
				'fc-today',
				view.highlightStateClass
			);
            }
            else if (date < today) {
                classes.push('fc-past');
            }
            else {
                classes.push('fc-future');
            }

            return classes;
        }

    });

    ; ;

    /* Event-rendering and event-interaction methods for the abstract Grid class
    ----------------------------------------------------------------------------------------------------------------------*/

    $.extend(Grid.prototype, {

        isMouseOverSeg: false, // is the user's mouse over a segment?
        isDraggingSeg: false, // is a segment being dragged?
        isResizingSeg: false, // is a segment being resized?


        // Renders the given events onto the grid
        renderEvents: function (events) {
            // subclasses must implement
        },


        // Retrieves all rendered segment objects in this grid
        getSegs: function () {
            // subclasses must implement
        },


        // Unrenders all events
        destroyEvents: function () {
            // subclasses must implement
        },


        // Renders a `el` property for each seg, and only returns segments that successfully rendered
        renderSegs: function (segs, disableResizing) {
            var view = this.view;
            var html = '';
            var renderedSegs = [];
            var i;

            // build a large concatenation of event segment HTML
            for (i = 0; i < segs.length; i++) {
                html += this.renderSegHtml(segs[i], disableResizing);
            }

            // Grab individual elements from the combined HTML string. Use each as the default rendering.
            // Then, compute the 'el' for each segment. An el might be null if the eventRender callback returned false.
            $(html).each(function (i, node) {
                var seg = segs[i];
                var el = view.resolveEventEl(seg.event, $(node));
                if (el) {
                    el.data('fc-seg', seg); // used by handlers
                    seg.el = el;
                    renderedSegs.push(seg);
                }
            });

            return renderedSegs;
        },


        // Generates the HTML for the default rendering of a segment
        renderSegHtml: function (seg, disableResizing) {
            // subclasses must implement
        },


        // Converts an array of event objects into an array of segment objects
        eventsToSegs: function (events, intervalStart, intervalEnd) {
            var _this = this;

            return $.map(events, function (event) {
                return _this.eventToSegs(event, intervalStart, intervalEnd); // $.map flattens all returned arrays together
            });
        },


        // Slices a single event into an array of event segments.
        // When `intervalStart` and `intervalEnd` are specified, intersect the events with that interval.
        // Otherwise, let the subclass decide how it wants to slice the segments over the grid.
        eventToSegs: function (event, intervalStart, intervalEnd) {
            var eventStart = event.start.clone().stripZone(); // normalize
            var eventEnd = this.view.calendar.getEventEnd(event).stripZone(); // compute (if necessary) and normalize
            var segs;
            var i, seg;

            if (intervalStart && intervalEnd) {
                seg = intersectionToSeg(eventStart, eventEnd, intervalStart, intervalEnd);
                segs = seg ? [seg] : [];
            }
            else {
                segs = this.rangeToSegs(eventStart, eventEnd); // defined by the subclass
            }

            // assign extra event-related properties to the segment objects
            for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                seg.event = event;
                seg.eventStartMS = +eventStart;
                seg.eventDurationMS = eventEnd - eventStart;
            }

            return segs;
        },


        /* Handlers
        ------------------------------------------------------------------------------------------------------------------*/


        // Attaches event-element-related handlers to the container element and leverage bubbling
        bindSegHandlers: function () {
            var _this = this;
            var view = this.view;

            $.each(
			{
			    mouseenter: function (seg, ev) {
			        _this.triggerSegMouseover(seg, ev);
			    },
			    mouseleave: function (seg, ev) {
			        _this.triggerSegMouseout(seg, ev);
			    },
			    click: function (seg, ev) {
			        return view.trigger('eventClick', this, seg.event, ev); // can return `false` to cancel
			    },
			    mousedown: function (seg, ev) {
			        if ($(ev.target).is('.fc-resizer') && view.isEventResizable(seg.event)) {
			            _this.segResizeMousedown(seg, ev);
			        }
			        else if (view.isEventDraggable(seg.event)) {
			            _this.segDragMousedown(seg, ev);
			        }
			    }
			},
			function (name, func) {
			    // attach the handler to the container element and only listen for real event elements via bubbling
			    _this.el.on(name, '.fc-event-container > *', function (ev) {
			        var seg = $(this).data('fc-seg'); // grab segment data. put there by View::renderEvents

			        // only call the handlers if there is not a drag/resize in progress
			        if (seg && !_this.isDraggingSeg && !_this.isResizingSeg) {
			            return func.call(this, seg, ev); // `this` will be the event element
			        }
			    });
			}
		);
        },


        // Updates internal state and triggers handlers for when an event element is moused over
        triggerSegMouseover: function (seg, ev) {
            if (!this.isMouseOverSeg) {
                this.isMouseOverSeg = true;
                this.view.trigger('eventMouseover', seg.el[0], seg.event, ev);
            }
        },


        // Updates internal state and triggers handlers for when an event element is moused out
        triggerSegMouseout: function (seg, ev) {
            if (this.isMouseOverSeg) {
                this.isMouseOverSeg = false;
                this.view.trigger('eventMouseout', seg.el[0], seg.event, ev);
            }
        },


        /* Dragging
        ------------------------------------------------------------------------------------------------------------------*/


        // Called when the user does a mousedown on an event, which might lead to dragging.
        // Generic enough to work with any type of Grid.
        segDragMousedown: function (seg, ev) {
            var _this = this;
            var view = this.view;
            var el = seg.el;
            var event = seg.event;
            var newStart, newEnd;

            // A clone of the original element that will move with the mouse
            var mouseFollower = new MouseFollower(seg.el, {
                parentEl: view.el,
                opacity: view.opt('dragOpacity'),
                revertDuration: view.opt('dragRevertDuration'),
                zIndex: 2 // one above the .fc-view
            });

            // Tracks mouse movement over the *view's* coordinate map. Allows dragging and dropping between subcomponents
            // of the view.
            var dragListener = new DragListener(view.coordMap, {
                distance: 5,
                scroll: view.opt('dragScroll'),
                listenStart: function (ev) {
                    mouseFollower.hide(); // don't show until we know this is a real drag
                    mouseFollower.start(ev);
                },
                dragStart: function (ev) {
                    _this.triggerSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
                    _this.isDraggingSeg = true;
                    if (!event.isChildCalendar){
                        view.hideEvent(event); // hide all event segments. our mouseFollower will take over
                    }
                    view.trigger('eventDragStart', el[0], event, ev, {}); // last argument is jqui dummy
                },
                cellOver: function (cell, date) {
                    var origDate = seg.cellDate || dragListener.origDate;
                    var res = _this.computeDraggedEventDates(seg, origDate, date);
                    newStart = res.start;
                    newEnd = res.end;

                    if (view.renderDrag(newStart, newEnd, seg)) { // have the view render a visual indication
                        mouseFollower.hide(); // if the view is already using a mock event "helper", hide our own
                    }
                    else {
                        mouseFollower.show();
                    }
                },
                cellOut: function () { // called before mouse moves to a different cell OR moved out of all cells
                    newStart = null;
                    view.destroyDrag(); // unrender whatever was done in view.renderDrag
                    mouseFollower.show(); // show in case we are moving out of all cells
                },
                dragStop: function (ev) {
                    var hasChanged = newStart && !newStart.isSame(event.start);

                    // do revert animation if hasn't changed. calls a callback when finished (whether animation or not)
                    mouseFollower.stop(!hasChanged, function () {
                        _this.isDraggingSeg = false;
                        view.destroyDrag();
                        view.showEvent(event);
                        view.trigger('eventDragStop', el[0], event, ev, {}); // last argument is jqui dummy

                        if (hasChanged) {
                            view.eventDrop(el[0], event, newStart, ev); // will rerender all events...

                            if ($.browser.safari && window.localStorage.getItem("lastView") === 'month') {
                                $(".fc-month-view").css("position", "static");
                            } else {
                                $(".fc-month-view").css("position", "relative");
                            }
                        }
                    });
                },
                listenStop: function () {
                    mouseFollower.stop(); // put in listenStop in case there was a mousedown but the drag never started
                }
            });

            dragListener.mousedown(ev); // start listening, which will eventually lead to a dragStart
        },


        // Given a segment, the dates where a drag began and ended, calculates the Event Object's new start and end dates
        computeDraggedEventDates: function (seg, dragStartDate, dropDate) {
            var view = this.view;
            var event = seg.event;
            var start = event.start;
            var end = view.calendar.getEventEnd(event);
            var delta;
            var newStart;
            var newEnd;

            if (dropDate.hasTime() === dragStartDate.hasTime()) {
                delta = dayishDiff(dropDate, dragStartDate);
                newStart = start.clone().add(delta);
                if (event.end === null) { // do we need to compute an end?
                    newEnd = null;
                }
                else {
                    newEnd = end.clone().add(delta);
                }
            }
            else {
                // if switching from day <-> timed, start should be reset to the dropped date, and the end cleared
                newStart = dropDate;
                newEnd = null; // end should be cleared
            }

            return { start: newStart, end: newEnd };
        },


        /* Resizing
        ------------------------------------------------------------------------------------------------------------------*/


        // Called when the user does a mousedown on an event's resizer, which might lead to resizing.
        // Generic enough to work with any type of Grid.
        segResizeMousedown: function (seg, ev) {
            var _this = this;
            var view = this.view;
            var el = seg.el;
            var event = seg.event;
            var start = event.start;
            var end = view.calendar.getEventEnd(event);
            var newEnd = null;
            var dragListener;

            function destroy() { // resets the rendering
                _this.destroyResize();
                view.showEvent(event);
            }

            // Tracks mouse movement over the *grid's* coordinate map
            dragListener = new DragListener(this.coordMap, {
                distance: 5,
                scroll: view.opt('dragScroll'),
                dragStart: function (ev) {
                    _this.triggerSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
                    _this.isResizingSeg = true;
                    view.trigger('eventResizeStart', el[0], event, ev, {}); // last argument is jqui dummy
                },
                cellOver: function (cell, date) {
                    // compute the new end. don't allow it to go before the event's start
                    if (date.isBefore(start)) { // allows comparing ambig to non-ambig
                        date = start;
                    }
                    newEnd = date.clone().add(_this.cellDuration); // make it an exclusive end

                    if (newEnd.isSame(end)) {
                        newEnd = null;
                        destroy();
                    }
                    else {
                        _this.renderResize(start, newEnd, seg);
                        view.hideEvent(event);
                    }
                },
                cellOut: function () { // called before mouse moves to a different cell OR moved out of all cells
                    newEnd = null;
                    destroy();
                },
                dragStop: function (ev) {
                    _this.isResizingSeg = false;
                    destroy();
                    view.trigger('eventResizeStop', el[0], event, ev, {}); // last argument is jqui dummy

                    if (newEnd) {
                        view.eventResize(el[0], event, newEnd, ev); // will rerender all events...

                        if ($.browser.safari && window.localStorage.getItem("lastView") === 'month') {
                            $(".fc-month-view").css("position", "static");
                        } else {
                            $(".fc-month-view").css("position", "relative");
                        }
                    }
                }
            });

            dragListener.mousedown(ev); // start listening, which will eventually lead to a dragStart
        },


        /* Rendering Utils
        ------------------------------------------------------------------------------------------------------------------*/


        // Generic utility for generating the HTML classNames for an event segment's element
        getSegClasses: function (seg, isDraggable, isResizable) {
            var event = seg.event;
            var classes = [
			'fc-event',
			seg.isStart ? 'fc-start' : 'fc-not-start',
			seg.isEnd ? 'fc-end' : 'fc-not-end'
		].concat(
			event.className,
			event.source ? event.source.className : []
		);

            if (isDraggable) {
                classes.push('fc-draggable');
            }
            if (isResizable) {
                classes.push('fc-resizable');
            }

            return classes;
        },


        // Utility for generating a CSS string with all the event skin-related properties
        getEventSkinCss: function (event) {
            var view = this.view;
            var source = event.source || {};
            var eventColor = event.color;
            var sourceColor = source.color;
            var optionColor = view.opt('eventColor');
            var backgroundColor =
			event.backgroundColor ||
			eventColor ||
			source.backgroundColor ||
			sourceColor ||
			view.opt('eventBackgroundColor') ||
			optionColor;
            var borderColor =
			event.borderColor ||
			eventColor ||
			source.borderColor ||
			sourceColor ||
			view.opt('eventBorderColor') ||
			optionColor;
            var textColor =
			event.textColor ||
			source.textColor ||
			view.opt('eventTextColor');
            var statements = [];
            if (backgroundColor) {
                statements.push('background-color:' + backgroundColor);
            }
            if (borderColor) {
                statements.push('border-color:' + borderColor);
            }
            if (textColor) {
                statements.push('color:' + textColor);
            }
            return statements.join(';');
        }

    });


    /* Event Segment Utilities
    ----------------------------------------------------------------------------------------------------------------------*/


    // A cmp function for determining which segments should take visual priority
    function compareSegs(seg1, seg2) {
        return seg1.eventStartMS - seg2.eventStartMS || // earlier events go first
		seg2.eventDurationMS - seg1.eventDurationMS || // tie? longer events go first
		seg2.event.allDay - seg1.event.allDay; //|| tie? put all-day events first (booleans cast to 0/1)
        //(seg1.event.title || '').localeCompare(seg2.event.title);  tie? alphabetically by title
    }


    ; ;

    /* A component that renders a grid of whole-days that runs horizontally. There can be multiple rows, one per week.
    ----------------------------------------------------------------------------------------------------------------------*/

    function DayGrid(view) {
        Grid.call(this, view); // call the super-constructor
    }


    DayGrid.prototype = createObject(Grid.prototype); // declare the super-class
    $.extend(DayGrid.prototype, {

        numbersVisible: false, // should render a row for day/week numbers? manually set by the view
        cellDuration: moment.duration({ days: 1 }), // required for Grid.event.js. Each cell is always a single day
        bottomCoordPadding: 0, // hack for extending the hit area for the last row of the coordinate grid

        rowEls: null, // set of fake row elements
        dayEls: null, // set of whole-day elements comprising the row's background
        helperEls: null, // set of cell skeleton elements for rendering the mock event "helper"
        highlightEls: null, // set of cell skeleton elements for rendering the highlight


        // Renders the rows and columns into the component's `this.el`, which should already be assigned.
        // isRigid determins whether the individual rows should ignore the contents and be a constant height.
        // Relies on the view's colCnt and rowCnt. In the future, this component should probably be self-sufficient.
        render: function (isRigid) {
            var view = this.view;
            var html = '';
            var row;

            for (row = 0; row < view.rowCnt; row++) {
                html += this.dayRowHtml(row, isRigid);
            }
            this.el.html(html);

            this.rowEls = this.el.find('.fc-row');
            this.dayEls = this.el.find('.fc-day');

            // run all the day cells through the dayRender callback
            this.dayEls.each(function (i, node) {
                var date = view.cellToDate(Math.floor(i / view.colCnt), i % view.colCnt);
                view.trigger('dayRender', null, date, $(node));
            });

            Grid.prototype.render.call(this); // call the super-method
        },


        destroy: function () {
            this.destroySegPopover();
        },


        // Generates the HTML for a single row. `row` is the row number.
        dayRowHtml: function (row, isRigid) {
            var view = this.view;
            var classes = ['fc-row', 'fc-week', view.widgetContentClass];

            if (isRigid) {
                classes.push('fc-rigid');
            }

            return '' +
			'<div class="' + classes.join(' ') + '">' +
				'<div class="fc-bg">' +
					'<table>' +
						this.rowHtml('day', row) + // leverages RowRenderer. calls dayCellHtml()
					'</table>' +
				'</div>' +
				'<div class="fc-content-skeleton">' +
					'<table>' +
						(this.numbersVisible ?
							'<thead>' +
								this.rowHtml('number', row) + // leverages RowRenderer. View will define render method
							'</thead>' :
							''
							) +
					'</table>' +
				'</div>' +
			'</div>';
        },


        // Renders the HTML for a whole-day cell. Will eventually end up in the day-row's background.
        // We go through a 'day' row type instead of just doing a 'bg' row type so that the View can do custom rendering
        // specifically for whole-day rows, whereas a 'bg' might also be used for other purposes (TimeGrid bg for example).
        dayCellHtml: function (row, col, date) {
            return this.bgCellHtml(row, col, date);
        },


        /* Coordinates & Cells
        ------------------------------------------------------------------------------------------------------------------*/


        // Populates the empty `rows` and `cols` arrays with coordinates of the cells. For CoordGrid.
        buildCoords: function (rows, cols) {
            var colCnt = this.view.colCnt;
            var e, n, p;

            this.dayEls.slice(0, colCnt).each(function (i, _e) { // iterate the first row of day elements
                e = $(_e);
                n = e.offset().left;
                if (i) {
                    p[1] = n;
                }
                p = [n];
                cols[i] = p;
            });
            p[1] = n + e.outerWidth();

            this.rowEls.each(function (i, _e) {
                e = $(_e);
                n = e.offset().top;
                if (i) {
                    p[1] = n;
                }
                p = [n];
                rows[i] = p;
            });
            p[1] = n + e.outerHeight() + this.bottomCoordPadding; // hack to extend hit area of last row
        },


        // Converts a cell to a date
        getCellDate: function (cell) {
            return this.view.cellToDate(cell); // leverages the View's cell system
        },


        // Gets the whole-day element associated with the cell
        getCellDayEl: function (cell) {
            return this.dayEls.eq(cell.row * this.view.colCnt + cell.col);
        },


        // Converts a range with an inclusive `start` and an exclusive `end` into an array of segment objects
        rangeToSegs: function (start, end) {
            return this.view.rangeToSegments(start, end); // leverages the View's cell system
        },


        /* Event Drag Visualization
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event hovering over the given date(s).
        // `end` can be null, as well as `seg`. See View's documentation on renderDrag for more info.
        // A returned value of `true` signals that a mock "helper" event has been rendered.
        renderDrag: function (start, end, seg) {
            var opacity;

            // always render a highlight underneath
            this.renderHighlight(
			start,
			end || this.view.calendar.getDefaultEventEnd(true, start)
		);

            // if a segment from the same calendar but another component is being dragged, render a helper event
            if (seg && !seg.el.closest(this.el).length) {

                this.renderRangeHelper(start, end, seg);

                opacity = this.view.opt('dragOpacity');
                if (opacity !== undefined) {
                    this.helperEls.css('opacity', opacity);
                }

                return true; // a helper has been rendered
            }
        },


        // Unrenders any visual indication of a hovering event
        destroyDrag: function () {
            this.destroyHighlight();
            this.destroyHelper();
        },


        /* Event Resize Visualization
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event being resized
        renderResize: function (start, end, seg) {
            this.renderHighlight(start, end);
            this.renderRangeHelper(start, end, seg);
        },


        // Unrenders a visual indication of an event being resized
        destroyResize: function () {
            this.destroyHighlight();
            this.destroyHelper();
        },


        /* Event Helper
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a mock "helper" event. `sourceSeg` is the associated internal segment object. It can be null.
        renderHelper: function (event, sourceSeg) {
            var helperNodes = [];
            var rowStructs = this.renderEventRows([event]);

            // inject each new event skeleton into each associated row
            this.rowEls.each(function (row, rowNode) {
                var rowEl = $(rowNode); // the .fc-row
                var skeletonEl = $('<div class="fc-helper-skeleton"><table/></div>'); // will be absolutely positioned
                var skeletonTop;

                // If there is an original segment, match the top position. Otherwise, put it at the row's top level
                if (sourceSeg && sourceSeg.row === row) {
                    skeletonTop = sourceSeg.el.position().top;
                }
                else {
                    skeletonTop = (rowEl.find('.fc-content-skeleton tbody').position() || {}).top;
                }

                skeletonEl.css('top', skeletonTop)
				.find('table')
					.append(rowStructs[row].tbodyEl);

                rowEl.append(skeletonEl);
                helperNodes.push(skeletonEl[0]);
            });

            this.helperEls = $(helperNodes); // array -> jQuery set
        },


        // Unrenders any visual indication of a mock helper event
        destroyHelper: function () {
            if (this.helperEls) {
                this.helperEls.remove();
                this.helperEls = null;
            }
        },


        /* Highlighting
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders an emphasis on the given date range. `start` is an inclusive, `end` is exclusive.
        renderHighlight: function (start, end) {
            var segs = this.rangeToSegs(start, end);
            var highlightNodes = [];
            var i, seg;
            var el;

            // build an event skeleton for each row that needs it
            for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                el = $(
				this.highlightSkeletonHtml(seg.leftCol, seg.rightCol + 1) // make end exclusive
			);
                el.appendTo(this.rowEls[seg.row]);
                highlightNodes.push(el[0]);
            }

            this.highlightEls = $(highlightNodes); // array -> jQuery set
        },


        // Unrenders any visual emphasis on a date range
        destroyHighlight: function () {
            if (this.highlightEls) {
                this.highlightEls.remove();
                this.highlightEls = null;
            }
        },


        // Generates the HTML used to build a single-row "highlight skeleton", a table that frames highlight cells
        highlightSkeletonHtml: function (startCol, endCol) {
            var colCnt = this.view.colCnt;
            var cellHtml = '';

            if (startCol > 0) {
                cellHtml += '<td colspan="' + startCol + '"/>';
            }
            if (endCol > startCol) {
                cellHtml += '<td colspan="' + (endCol - startCol) + '" class="fc-highlight" />';
            }
            if (colCnt > endCol) {
                cellHtml += '<td colspan="' + (colCnt - endCol) + '"/>';
            }

            cellHtml = this.bookendCells(cellHtml, 'highlight');

            return '' +
			'<div class="fc-highlight-skeleton">' +
				'<table>' +
					'<tr>' +
						cellHtml +
					'</tr>' +
				'</table>' +
			'</div>';
        }

    });

    ; ;

    /* Event-rendering methods for the DayGrid class
    ----------------------------------------------------------------------------------------------------------------------*/

    $.extend(DayGrid.prototype, {

        segs: null,
        rowStructs: null, // an array of objects, each holding information about a row's event-rendering


        // Render the given events onto the Grid and return the rendered segments
        renderEvents: function (events) {
            var rowStructs = this.rowStructs = this.renderEventRows(events);
            var segs = [];

            // append to each row's content skeleton
            this.rowEls.each(function (i, rowNode) {
                $(rowNode).find('.fc-content-skeleton > table').append(
				rowStructs[i].tbodyEl
			);
                segs.push.apply(segs, rowStructs[i].segs);
            });

            this.segs = segs;
        },


        // Retrieves all segment objects that have been rendered
        getSegs: function () {
            return (this.segs || []).concat(
			this.popoverSegs || [] // segs rendered in the "more" events popover
		);
        },


        // Removes all rendered event elements
        destroyEvents: function () {
            var rowStructs = this.rowStructs || [];
            var rowStruct;

            while ((rowStruct = rowStructs.pop())) {
                rowStruct.tbodyEl.remove();
            }

            this.segs = null;
            this.destroySegPopover(); // removes the "more.." events popover
        },


        // Uses the given events array to generate <tbody> elements that should be appended to each row's content skeleton.
        // Returns an array of rowStruct objects (see the bottom of `renderEventRow`).
        renderEventRows: function (events) {
            var segs = this.eventsToSegs(events);
            var rowStructs = [];
            var segRows;
            var row;

            segs = this.renderSegs(segs); // returns a new array with only visible segments
            segRows = this.groupSegRows(segs); // group into nested arrays

            // iterate each row of segment groupings
            for (row = 0; row < segRows.length; row++) {
                rowStructs.push(
				this.renderEventRow(row, segRows[row])
			);
            }

            return rowStructs;
        },


        // Builds the HTML to be used for the default element for an individual segment
        renderSegHtml: function (seg, disableResizing) {
            var view = this.view;
            var isRTL = view.opt('isRTL');
            var event = seg.event;
            var isDraggable = view.isEventDraggable(event);
            var isResizable = !disableResizing && event.allDay && seg.isEnd && view.isEventResizable(event);
            var classes = this.getSegClasses(seg, isDraggable, isResizable);
            var skinCss = this.getEventSkinCss(event);
            var timeHtml = '';
            var titleHtml;
            var hoverBgColor = null;

            classes.unshift('fc-day-grid-event');

            var backgroundColor = function (skinCss) {
                if (skinCss.indexOf("#EF9A9A") >= 0) //红色
                    return "background:#F44336";
                if (skinCss.indexOf("#CE93D8") >= 0) //紫色
                    return "background:#9C27B0";
                if (skinCss.indexOf("#BCAAA4") >= 0) //褐色
                    return "background:#795548";
                if (skinCss.indexOf("#FFCC80") >= 0) //橙色
                    return "background:#FF9800";
                if (skinCss.indexOf("#90CAF9") >= 0) //蓝色
                    return "background:#1E88E5";
                if (skinCss.indexOf("#A5D6A7") >= 0) //绿色
                    return "background:#4CAF50";
                if (skinCss.indexOf("#FFF59D") >= 0) //黄色
                    return "background:#FFEB3B";
                if (skinCss.indexOf("#E6E6E6") >= 0) //灰色
                    return "background:#B4B4B4";
            };

            // Only display a timed events time if it is the starting segment
            if (view.name == 'month') {
                if (!event.isAllDay && seg.isStart) {
                    var startTime = moment(event.startTime).format('HH:mm');
                    var endTime = moment(event.endTime).format('HH:mm');
                    if (moment(event.startTime).format('YYYY-MM-DD') != moment(event.endTime).format('YYYY-MM-DD'))
                        timeHtml = '<span class="fc-time" data-start="' + startTime + '" data-end="' + endTime + '">' + startTime + '</span>';
                    else {
                        timeHtml = '<span class="notAllDayMark" style="' + backgroundColor(skinCss) + '"></span> <span class="fc-time" data-start="' + startTime + '" data-end="' + endTime + '">' + startTime + '</span>';

                        hoverBgColor = backgroundColor(skinCss);
                        skinCss = skinCss.split(";")[skinCss.split(";").length-1];
                    }
                }
            }

            titleHtml =
			'<span class="fc-title">' +
				(event.isTask ? event.title : (htmlEscape(event.title || '') || '&nbsp;')) + // we always want one line of height
            '</span>';

            if (view.name !== 'month' && (!event.isAllDay && seg.isStart) && (moment(event.startTime).format('YYYY-MM-DD') != moment(event.endTime).format('YYYY-MM-DD'))) {
                titleHtml =
                    '<span class="fc-title">' +
				        (event.isTask ? event.title : (htmlEscape(event.title || '') || '&nbsp;')) + // we always want one line of height
                    '</span>';
            }

            titleHtml = titleHtml.replace(_l('(全天)'), "<span class='fcTitleFont'>" + _l('(全天)') + "</span>");

            var bgClass = event.allDay ? " showActiveTitle" : " showActiveTitle notAllDayOver";
            if ((moment(event.end) - moment(event.start)) / (24 * 60 * 60 * 1000) > 1)
                bgClass = " showActiveTitle";

            return '<a class="' + classes.join(' ') + bgClass + '" data-hoverBgColor="' + hoverBgColor + '"' +
				(event.url ?
					' href="' + htmlEscape(event.url) + '"' :
					''
					) +
				(skinCss ?
					' style="' + skinCss + '"' :
					''
					) +
			'>' +
				'<div class="fc-content">' +
					(((isRTL ? // put a natural space in between
            titleHtml + ' ' + timeHtml : timeHtml + ' ' + titleHtml))   //
						) +
				'</div>' +
				(isResizable ?
					'<div class="fc-resizer"/>' :
					''
					) +
			'</a>';
        },


        // Given a row # and an array of segments all in the same row, render a <tbody> element, a skeleton that contains
        // the segments. Returns object with a bunch of internal data about how the render was calculated.
        renderEventRow: function (row, rowSegs) {
            var view = this.view;
            var colCnt = view.colCnt;
            var segLevels = this.buildSegLevels(rowSegs); // group into sub-arrays of levels
            var levelCnt = Math.max(1, segLevels.length); // ensure at least one level
            var tbody = $('<tbody/>');
            var segMatrix = []; // lookup for which segments are rendered into which level+col cells
            var cellMatrix = []; // lookup for all <td> elements of the level+col matrix
            var loneCellMatrix = []; // lookup for <td> elements that only take up a single column
            var i, levelSegs;
            var col;
            var tr;
            var j, seg;
            var td;

            // populates empty cells from the current column (`col`) to `endCol`
            function emptyCellsUntil(endCol) {
                while (col < endCol) {
                    // try to grab a cell from the level above and extend its rowspan. otherwise, create a fresh cell
                    td = (loneCellMatrix[i - 1] || [])[col];
                    if (td) {
                        td.attr(
						'rowspan',
						parseInt(td.attr('rowspan') || 1, 10) + 1
					);
                    }
                    else {
                        td = $('<td/>');
                        tr.append(td);
                    }
                    cellMatrix[i][col] = td;
                    loneCellMatrix[i][col] = td;
                    col++;
                }
            }

            for (i = 0; i < levelCnt; i++) { // iterate through all levels
                levelSegs = segLevels[i];
                col = 0;
                tr = $('<tr/>');

                segMatrix.push([]);
                cellMatrix.push([]);
                loneCellMatrix.push([]);

                // levelCnt might be 1 even though there are no actual levels. protect against this.
                // this single empty row is useful for styling.
                if (levelSegs) {
                    for (j = 0; j < levelSegs.length; j++) { // iterate through segments in level
                        seg = levelSegs[j];

                        emptyCellsUntil(seg.leftCol);

                        // create a container that occupies or more columns. append the event element.
                        td = $('<td class="fc-event-container"/>').append(seg.el);
                        if (seg.leftCol != seg.rightCol) {
                            td.attr('colspan', seg.rightCol - seg.leftCol + 1);
                        }
                        else { // a single-column segment
                            loneCellMatrix[i][col] = td;
                        }

                        while (col <= seg.rightCol) {
                            cellMatrix[i][col] = td;
                            segMatrix[i][col] = seg;
                            col++;
                        }

                        tr.append(td);
                    }
                }

                emptyCellsUntil(colCnt); // finish off the row
                this.bookendCells(tr, 'eventSkeleton');
                tbody.append(tr);
            }

            return { // a "rowStruct"
                row: row, // the row number
                tbodyEl: tbody,
                cellMatrix: cellMatrix,
                segMatrix: segMatrix,
                segLevels: segLevels,
                segs: rowSegs
            };
        },


        // Stacks a flat array of segments, which are all assumed to be in the same row, into subarrays of vertical levels.
        buildSegLevels: function (segs) {
            var levels = [];
            var i, seg;
            var j;

            // Give preference to elements with certain criteria, so they have
            // a chance to be closer to the top.
            segs.sort(compareSegs);

            for (i = 0; i < segs.length; i++) {
                seg = segs[i];

                // loop through levels, starting with the topmost, until the segment doesn't collide with other segments
                for (j = 0; j < levels.length; j++) {
                    if (!isDaySegCollision(seg, levels[j])) {
                        break;
                    }
                }
                // `j` now holds the desired subrow index
                seg.level = j;

                // create new level array if needed and append segment
                (levels[j] || (levels[j] = [])).push(seg);
            }

            // order segments left-to-right. very important if calendar is RTL
            for (j = 0; j < levels.length; j++) {
                levels[j].sort(compareDaySegCols);
            }

            return levels;
        },


        // Given a flat array of segments, return an array of sub-arrays, grouped by each segment's row
        groupSegRows: function (segs) {
            var view = this.view;
            var segRows = [];
            var i;

            for (i = 0; i < view.rowCnt; i++) {
                segRows.push([]);
            }

            for (i = 0; i < segs.length; i++) {
                segRows[segs[i].row].push(segs[i]);
            }

            return segRows;
        }

    });


    // Computes whether two segments' columns collide. They are assumed to be in the same row.
    function isDaySegCollision(seg, otherSegs) {
        var i, otherSeg;

        for (i = 0; i < otherSegs.length; i++) {
            otherSeg = otherSegs[i];

            if (
			otherSeg.leftCol <= seg.rightCol &&
			otherSeg.rightCol >= seg.leftCol
		) {
                return true;
            }
        }

        return false;
    }


    // A cmp function for determining the leftmost event
    function compareDaySegCols(a, b) {
        return a.leftCol - b.leftCol;
    }

    ; ;

    /* Methods relate to limiting the number events for a given day on a DayGrid
    ----------------------------------------------------------------------------------------------------------------------*/

    $.extend(DayGrid.prototype, {


        segPopover: null, // the Popover that holds events that can't fit in a cell. null when not visible
        popoverSegs: null, // an array of segment objects that the segPopover holds. null when not visible


        destroySegPopover: function () {
            if (this.segPopover) {
                this.segPopover.hide(); // will trigger destruction of `segPopover` and `popoverSegs`
            }
        },


        // Limits the number of "levels" (vertically stacking layers of events) for each row of the grid.
        // `levelLimit` can be false (don't limit), a number, or true (should be computed).
        limitRows: function (levelLimit) {
            var rowStructs = this.rowStructs || [];
            var row; // row #
            var rowLevelLimit;

            for (row = 0; row < rowStructs.length; row++) {
                this.unlimitRow(row);

                if (!levelLimit) {
                    rowLevelLimit = false;
                }
                else if (typeof levelLimit === 'number') {
                    rowLevelLimit = levelLimit;
                }
                else {
                    rowLevelLimit = this.computeRowLevelLimit(row);
                }

                if (rowLevelLimit !== false) {
                    this.limitRow(row, rowLevelLimit);
                }
            }
        },


        // Computes the number of levels a row will accomodate without going outside its bounds.
        // Assumes the row is "rigid" (maintains a constant height regardless of what is inside).
        // `row` is the row number.
        computeRowLevelLimit: function (row) {
            var rowEl = this.rowEls.eq(row); // the containing "fake" row div
            var rowHeight = rowEl.height(); // TODO: cache somehow?
            var trEls = this.rowStructs[row].tbodyEl.children();
            var i, trEl;

            // Reveal one level <tr> at a time and stop when we find one out of bounds
            for (i = 0; i < trEls.length; i++) {
                trEl = trEls.eq(i).removeClass('fc-limited'); // get and reveal
                if (trEl.position().top + trEl.outerHeight() > rowHeight) {
                    return i;
                }
            }

            return false; // should not limit at all
        },


        // Limits the given grid row to the maximum number of levels and injects "more" links if necessary.
        // `row` is the row number.
        // `levelLimit` is a number for the maximum (inclusive) number of levels allowed.
        limitRow: function (row, levelLimit) {
            var _this = this;
            var view = this.view;
            var rowStruct = this.rowStructs[row];
            var moreNodes = []; // array of "more" <a> links and <td> DOM nodes
            var col = 0; // col #
            var cell;
            var levelSegs; // array of segment objects in the last allowable level, ordered left-to-right
            var cellMatrix; // a matrix (by level, then column) of all <td> jQuery elements in the row
            var limitedNodes; // array of temporarily hidden level <tr> and segment <td> DOM nodes
            var i, seg;
            var segsBelow; // array of segment objects below `seg` in the current `col`
            var totalSegsBelow; // total number of segments below `seg` in any of the columns `seg` occupies
            var colSegsBelow; // array of segment arrays, below seg, one for each column (offset from segs's first column)
            var td, rowspan;
            var segMoreNodes; // array of "more" <td> cells that will stand-in for the current seg's cell
            var j;
            var moreTd, moreWrap, moreLink;

            // Iterates through empty level cells and places "more" links inside if need be
            function emptyCellsUntil(endCol) { // goes from current `col` to `endCol`
                while (col < endCol) {
                    cell = { row: row, col: col };
                    segsBelow = _this.getCellSegs(cell, levelLimit);
                    if (segsBelow.length) {
                        td = cellMatrix[levelLimit - 1][col];
                        moreLink = _this.renderMoreLink(cell, segsBelow);
                        moreWrap = $('<div/>').append(moreLink);
                        td.append(moreWrap);
                        moreNodes.push(moreWrap[0]);
                    }
                    col++;
                }
            }

            if (levelLimit && levelLimit < rowStruct.segLevels.length) { // is it actually over the limit?
                levelSegs = rowStruct.segLevels[levelLimit - 1];
                cellMatrix = rowStruct.cellMatrix;

                limitedNodes = rowStruct.tbodyEl.children().slice(levelLimit) // get level <tr> elements past the limit
				.addClass('fc-limited').get(); // hide elements and get a simple DOM-nodes array

                // iterate though segments in the last allowable level
                for (i = 0; i < levelSegs.length; i++) {
                    seg = levelSegs[i];
                    emptyCellsUntil(seg.leftCol); // process empty cells before the segment

                    // determine *all* segments below `seg` that occupy the same columns
                    colSegsBelow = [];
                    totalSegsBelow = 0;
                    while (col <= seg.rightCol) {
                        cell = { row: row, col: col };
                        segsBelow = this.getCellSegs(cell, levelLimit);
                        colSegsBelow.push(segsBelow);
                        totalSegsBelow += segsBelow.length;
                        col++;
                    }

                    if (totalSegsBelow) { // do we need to replace this segment with one or many "more" links?
                        td = cellMatrix[levelLimit - 1][seg.leftCol]; // the segment's parent cell
                        rowspan = td.attr('rowspan') || 1;
                        segMoreNodes = [];

                        // make a replacement <td> for each column the segment occupies. will be one for each colspan
                        for (j = 0; j < colSegsBelow.length; j++) {
                            moreTd = $('<td class="fc-more-cell"/>').attr('rowspan', rowspan);
                            segsBelow = colSegsBelow[j];
                            cell = { row: row, col: seg.leftCol + j };
                            moreLink = this.renderMoreLink(cell, [seg].concat(segsBelow)); // count seg as hidden too
                            moreWrap = $('<div/>').append(moreLink);
                            moreTd.append(moreWrap);
                            segMoreNodes.push(moreTd[0]);
                            moreNodes.push(moreTd[0]);
                        }

                        td.addClass('fc-limited').after($(segMoreNodes)); // hide original <td> and inject replacements
                        limitedNodes.push(td[0]);
                    }
                }

                emptyCellsUntil(view.colCnt); // finish off the level
                rowStruct.moreEls = $(moreNodes); // for easy undoing later
                rowStruct.limitedEls = $(limitedNodes); // for easy undoing later
            }
        },


        // Reveals all levels and removes all "more"-related elements for a grid's row.
        // `row` is a row number.
        unlimitRow: function (row) {
            var rowStruct = this.rowStructs[row];

            if (rowStruct.moreEls) {
                rowStruct.moreEls.remove();
                rowStruct.moreEls = null;
            }

            if (rowStruct.limitedEls) {
                rowStruct.limitedEls.removeClass('fc-limited');
                rowStruct.limitedEls = null;
            }
        },


        // Renders an <a> element that represents hidden event element for a cell.
        // Responsible for attaching click handler as well.
        renderMoreLink: function (cell, hiddenSegs) {
            var _this = this;
            var view = this.view;

            return $('<a class="fc-more"/>')
			.text(
				this.getMoreLinkText(hiddenSegs.length)
			)
			.on('click', function (ev) {
			    var clickOption = view.opt('eventLimitClick');
			    var date = view.cellToDate(cell);
			    var moreEl = $(this);
			    var dayEl = _this.getCellDayEl(cell);
			    var allSegs = _this.getCellSegs(cell);

			    // rescope the segments to be within the cell's date
			    var reslicedAllSegs = _this.resliceDaySegs(allSegs, date);
			    var reslicedHiddenSegs = _this.resliceDaySegs(hiddenSegs, date);

			    if (typeof clickOption === 'function') {
			        // the returned value can be an atomic option
			        clickOption = view.trigger('eventLimitClick', null, {
			            date: date,
			            dayEl: dayEl,
			            moreEl: moreEl,
			            segs: reslicedAllSegs,
			            hiddenSegs: reslicedHiddenSegs
			        }, ev);
			    }

			    if (clickOption === 'popover') {
			        _this.showSegPopover(date, cell, moreEl, reslicedAllSegs);
			    }
			    else if (typeof clickOption === 'string') { // a view name
			        view.calendar.zoomTo(date, clickOption);
			    }
			});
        },


        // Reveals the popover that displays all events within a cell
        showSegPopover: function (date, cell, moreLink, segs) {
            var _this = this;
            var view = this.view;
            var moreWrap = moreLink.parent(); // the <div> wrapper around the <a>
            var topEl; // the element we want to match the top coordinate of
            var options;

            if (view.rowCnt == 1) {
                topEl = this.view.el; // will cause the popover to cover any sort of header
            }
            else {
                topEl = this.rowEls.eq(cell.row); // will align with top of row
            }

            options = {
                className: 'fc-more-popover',
                content: this.renderSegPopoverContent(date, segs),
                parentEl: this.el,
                top: topEl.offset().top,
                autoHide: true, // when the user clicks elsewhere, hide the popover
                viewportConstrain: view.opt('popoverViewportConstrain'),
                hide: function () {
                    // destroy everything when the popover is hidden
                    _this.segPopover.destroy();
                    _this.segPopover = null;
                    _this.popoverSegs = null;
                }
            };

            // Determine horizontal coordinate.
            // We use the moreWrap instead of the <td> to avoid border confusion.
            if (view.opt('isRTL')) {
                options.right = moreWrap.offset().left + moreWrap.outerWidth() + 1; // +1 to be over cell border
            }
            else {
                options.left = moreWrap.offset().left - 1; // -1 to be over cell border
            }

            this.segPopover = new Popover(options);
            this.segPopover.show();
        },


        // Builds the inner DOM contents of the segment popover
        renderSegPopoverContent: function (date, segs) {
            var view = this.view;
            var isTheme = view.opt('theme');
            var title = date.format(view.opt('dayPopoverFormat'));
            var content = $(
			'<div class="fc-header ' + view.widgetHeaderClass + '">' +
				'<span class="fc-close ' +
					(isTheme ? 'ui-icon ui-icon-closethick' : 'fc-icon fc-icon-x') +
				'"></span>' +
				'<span class="fc-title">' +
					htmlEscape(title) +
				'</span>' +
				'<div class="fc-clear"/>' +
			'</div>' +
			'<div class="fc-body ' + view.widgetContentClass + '">' +
				'<div class="fc-event-container"></div>' +
			'</div>'
		);
            var segContainer = content.find('.fc-event-container');
            var i;

            // render each seg's `el` and only return the visible segs
            segs = this.renderSegs(segs, true); // disableResizing=true
            this.popoverSegs = segs;

            for (i = 0; i < segs.length; i++) {

                // because segments in the popover are not part of a grid coordinate system, provide a hint to any
                // grids that want to do drag-n-drop about which cell it came from
                segs[i].cellDate = date;

		segContainer.append(segs[i].el);

		if (segs[i].event.isTask) {
		    segContainer.find(".fc-title").eq(i).prepend('<span class="icon-calendartask" style="width:14px;display: inline-block;height:14px;margin: 1px 3px -2px 0;font-size: 16px;vertical-align: top;"> </span>');
		}

                if ($("#tb_OtherUserCalendar .addOtherUser").length > 0) {
                    segContainer.find(".fc-title").eq(i).prepend('<img src="' + segs[i].event.head + '" style="width:14px;margin-top: 1px; height:14px;margin-bottom:-2px;padding-right: 3px;">');
                }
            }

            return content;
        },


        // Given the events within an array of segment objects, reslice them to be in a single day
        resliceDaySegs: function (segs, dayDate) {
            var events = $.map(segs, function (seg) {
                return seg.event;
            });
            var dayStart = dayDate.clone().stripTime();
            var dayEnd = dayStart.clone().add(1, 'days');

            return this.eventsToSegs(events, dayStart, dayEnd);
        },


        // Generates the text that should be inside a "more" link, given the number of events it represents
        getMoreLinkText: function (num) {
            var view = this.view;
            var opt = view.opt('eventLimitText');

            if (typeof opt === 'function') {
                return opt(num);
            }
            else {
                return '+' + num + ' ' + opt;
            }
        },


        // Returns segments within a given cell.
        // If `startLevel` is specified, returns only events including and below that level. Otherwise returns all segs.
        getCellSegs: function (cell, startLevel) {
            var segMatrix = this.rowStructs[cell.row].segMatrix;
            var level = startLevel || 0;
            var segs = [];
            var seg;

            while (level < segMatrix.length) {
                seg = segMatrix[level][cell.col];
                if (seg) {
                    segs.push(seg);
                }
                level++;
            }

            return segs;
        }

    });

    ; ;

    /* A component that renders one or more columns of vertical time slots
    ----------------------------------------------------------------------------------------------------------------------*/

    function TimeGrid(view) {
        Grid.call(this, view); // call the super-constructor
    }


    TimeGrid.prototype = createObject(Grid.prototype); // define the super-class
    $.extend(TimeGrid.prototype, {

        slotDuration: null, // duration of a "slot", a distinct time segment on given day, visualized by lines
        snapDuration: null, // granularity of time for dragging and selecting

        minTime: null, // Duration object that denotes the first visible time of any given day
        maxTime: null, // Duration object that denotes the exclusive visible end time of any given day

        dayEls: null, // cells elements in the day-row background
        slatEls: null, // elements running horizontally across all columns

        slatTops: null, // an array of top positions, relative to the container. last item holds bottom of last slot

        highlightEl: null, // cell skeleton element for rendering the highlight
        helperEl: null, // cell skeleton element for rendering the mock event "helper"


        // Renders the time grid into `this.el`, which should already be assigned.
        // Relies on the view's colCnt. In the future, this component should probably be self-sufficient.
        render: function () {
            this.processOptions();

            this.el.html(this.renderHtml());

            this.dayEls = this.el.find('.fc-day');
            this.slatEls = this.el.find('.fc-slats tr');

            this.computeSlatTops();

            Grid.prototype.render.call(this); // call the super-method
        },


        // Renders the basic HTML skeleton for the grid
        renderHtml: function () {
            return '' +
			'<div class="fc-bg">' +
				'<table>' +
					this.rowHtml('slotBg') + // leverages RowRenderer, which will call slotBgCellHtml
				'</table>' +
			'</div>' +
			'<div class="fc-slats">' +
				'<table>' +
					this.slatRowHtml() +
				'</table>' +
			'</div>';
        },


        // Renders the HTML for a vertical background cell behind the slots.
        // This method is distinct from 'bg' because we wanted a new `rowType` so the View could customize the rendering.
        slotBgCellHtml: function (row, col, date) {
            return this.bgCellHtml(row, col, date);
        },


        // Generates the HTML for the horizontal "slats" that run width-wise. Has a time axis on a side. Depends on RTL.
        slatRowHtml: function () {
            var view = this.view;
            var calendar = view.calendar;
            var isRTL = view.opt('isRTL');
            var html = '';
            var slotNormal = this.slotDuration.asMinutes() % 15 === 0;
            var slotTime = moment.duration(+this.minTime); // wish there was .clone() for durations
            var slotDate; // will be on the view's first day, but we only care about its time
            var minutes;
            var axisHtml;

            // Calculate the time for each slot
            while (slotTime < this.maxTime) {
                slotDate = view.start.clone().time(slotTime); // will be in UTC but that's good. to avoid DST issues
                minutes = slotDate.minutes();

                axisHtml =
				'<td class="fc-axis fc-time ' + view.widgetContentClass + '" ' + view.axisStyleAttr() + '>' +
					((!slotNormal || !minutes) ? // if irregular slot duration, or on the hour, then display the time
						'<span>' + // for matchCellWidths
							htmlEscape(calendar.formatDate(slotDate, view.opt('axisFormat'))) +
						'</span>' :
						''
						) +
				'</td>';


                html +=
                '<tr ' + (!minutes ? '' : 'class="fc-minor"') + '>' +
                	(!isRTL ? axisHtml : '') +
                	'<td class="' + view.widgetContentClass + '"/>' +
                	(isRTL ? axisHtml : '') +
                "</tr>";

                slotTime.add(this.slotDuration);
            }

            return html;
        },


        // Parses various options into properties of this object
        processOptions: function () {
            var view = this.view;
            var slotDuration = view.opt('slotDuration');
            var snapDuration = view.opt('snapDuration');

            slotDuration = moment.duration(slotDuration);
            snapDuration = snapDuration ? moment.duration(snapDuration) : slotDuration;

            this.slotDuration = slotDuration;
            this.snapDuration = snapDuration;
            this.cellDuration = snapDuration; // important to assign this for Grid.events.js

            this.minTime = moment.duration(view.opt('minTime'));
            this.maxTime = moment.duration(view.opt('maxTime'));
        },


        // Slices up a date range into a segment for each column
        rangeToSegs: function (rangeStart, rangeEnd) {
            var view = this.view;
            var segs = [];
            var seg;
            var col;
            var cellDate;
            var colStart, colEnd;

            // normalize
            rangeStart = rangeStart.clone().stripZone();
            rangeEnd = rangeEnd.clone().stripZone();

            for (col = 0; col < view.colCnt; col++) {
                cellDate = view.cellToDate(0, col); // use the View's cell system for this
                colStart = cellDate.clone().time(this.minTime);
                colEnd = cellDate.clone().time(this.maxTime);
                seg = intersectionToSeg(rangeStart, rangeEnd, colStart, colEnd);
                if (seg) {
                    seg.col = col;
                    segs.push(seg);
                }
            }

            return segs;
        },


        /* Coordinates
        ------------------------------------------------------------------------------------------------------------------*/


        // Called when there is a window resize/zoom and we need to recalculate coordinates for the grid
        resize: function () {
            this.computeSlatTops();
            this.updateSegVerticals();
        },


        // Populates the given empty `rows` and `cols` arrays with offset positions of the "snap" cells.
        // "Snap" cells are different the slots because they might have finer granularity.
        buildCoords: function (rows, cols) {
            var colCnt = this.view.colCnt;
            var originTop = this.el.offset().top;
            var snapTime = moment.duration(+this.minTime);
            var p = null;
            var e, n;

            this.dayEls.slice(0, colCnt).each(function (i, _e) {
                e = $(_e);
                n = e.offset().left;
                if (p) {
                    p[1] = n;
                }
                p = [n];
                cols[i] = p;
            });
            p[1] = n + e.outerWidth();

            p = null;
            while (snapTime < this.maxTime) {
                n = originTop + this.computeTimeTop(snapTime);
                if (p) {
                    p[1] = n;
                }
                p = [n];
                rows.push(p);
                snapTime.add(this.snapDuration);
            }
            p[1] = originTop + this.computeTimeTop(snapTime); // the position of the exclusive end
        },


        // Gets the datetime for the given slot cell
        getCellDate: function (cell) {
            var view = this.view;
            var calendar = view.calendar;

            return calendar.rezoneDate( // since we are adding a time, it needs to be in the calendar's timezone
			view.cellToDate(0, cell.col) // View's coord system only accounts for start-of-day for column
				.time(this.minTime + this.snapDuration * cell.row)
		);
        },


        // Gets the element that represents the whole-day the cell resides on
        getCellDayEl: function (cell) {
            return this.dayEls.eq(cell.col);
        },


        // Computes the top coordinate, relative to the bounds of the grid, of the given date.
        // A `startOfDayDate` must be given for avoiding ambiguity over how to treat midnight.
        computeDateTop: function (date, startOfDayDate) {
            return this.computeTimeTop(
			moment.duration(
				date.clone().stripZone() - startOfDayDate.clone().stripTime()
			)
		);
        },


        // Computes the top coordinate, relative to the bounds of the grid, of the given time (a Duration).
        computeTimeTop: function (time) {
            var slatCoverage = (time - this.minTime) / this.slotDuration; // floating-point value of # of slots covered
            var slatIndex;
            var slatRemainder;
            var slatTop;
            var slatBottom;

            // constrain. because minTime/maxTime might be customized
            slatCoverage = Math.max(0, slatCoverage);
            slatCoverage = Math.min(this.slatEls.length, slatCoverage);

            slatIndex = Math.floor(slatCoverage); // an integer index of the furthest whole slot
            slatRemainder = slatCoverage - slatIndex;
            slatTop = this.slatTops[slatIndex]; // the top position of the furthest whole slot

            if (slatRemainder) { // time spans part-way into the slot
                slatBottom = this.slatTops[slatIndex + 1];
                return slatTop + (slatBottom - slatTop) * slatRemainder; // part-way between slots
            }
            else {
                return slatTop;
            }
        },


        // Queries each `slatEl` for its position relative to the grid's container and stores it in `slatTops`.
        // Includes the the bottom of the last slat as the last item in the array.
        computeSlatTops: function () {
            var tops = [];
            var top;

            this.slatEls.each(function (i, node) {
                top = $(node).position().top;
                tops.push(top);
            });

            tops.push(top + this.slatEls.last().outerHeight()); // bottom of the last slat

            this.slatTops = tops;
        },


        /* Event Drag Visualization
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event being dragged over the specified date(s).
        // `end` and `seg` can be null. See View's documentation on renderDrag for more info.
        renderDrag: function (start, end, seg) {
            var opacity;

            if (seg) { // if there is event information for this drag, render a helper event
                this.renderRangeHelper(start, end, seg);

                opacity = this.view.opt('dragOpacity');
                if (opacity !== undefined) {
                    this.helperEl.css('opacity', opacity);
                }

                return true; // signal that a helper has been rendered
            }
            else {
                // otherwise, just render a highlight
                this.renderHighlight(
				start,
				end || this.view.calendar.getDefaultEventEnd(false, start)
			);
            }
        },


        // Unrenders any visual indication of an event being dragged
        destroyDrag: function () {
            this.destroyHelper();
            this.destroyHighlight();
        },


        /* Event Resize Visualization
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event being resized
        renderResize: function (start, end, seg) {
            this.renderRangeHelper(start, end, seg);
        },


        // Unrenders any visual indication of an event being resized
        destroyResize: function () {
            this.destroyHelper();
        },


        /* Event Helper
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a mock "helper" event. `sourceSeg` is the original segment object and might be null (an external drag)
        renderHelper: function (event, sourceSeg) {
            var res = this.renderEventTable([event]);
            var tableEl = res.tableEl;
            var segs = res.segs;
            var i, seg;
            var sourceEl;

            // Try to make the segment that is in the same row as sourceSeg look the same
            for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                if (sourceSeg && sourceSeg.col === seg.col) {
                    sourceEl = sourceSeg.el;
                    seg.el.css({
                        left: sourceEl.css('left'),
                        right: sourceEl.css('right'),
                        'margin-left': sourceEl.css('margin-left'),
                        'margin-right': sourceEl.css('margin-right')
                    });
                }
            }

            this.helperEl = $('<div class="fc-helper-skeleton"/>')
			.append(tableEl)
				.appendTo(this.el);

            $($(".fc-helper-skeleton")).find(".fc-axis").css("width", "31px");

            this.helperEl.html(this.helperEl.html().replace("undefined", ""));
            this.helperEl.find(".removeClass").remove();
        },


        // Unrenders any mock helper event
        destroyHelper: function () {
            if (this.helperEl) {
                this.helperEl.remove();
                this.helperEl = null;
            }
        },


        /* Selection
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of a selection. Overrides the default, which was to simply render a highlight.
        renderSelection: function (start, end) {
            if (this.view.opt('selectHelper')) { // this setting signals that a mock helper event should be rendered
                this.renderRangeHelper(start, end);
            }
            else {
                this.renderHighlight(start, end);
            }
        },


        // Unrenders any visual indication of a selection
        destroySelection: function () {
            this.destroyHelper();
            this.destroyHighlight();
        },


        /* Highlight
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders an emphasis on the given date range. `start` is inclusive. `end` is exclusive.
        renderHighlight: function (start, end) {
            this.highlightEl = $(
			this.highlightSkeletonHtml(start, end)
		).appendTo(this.el);
        },


        // Unrenders the emphasis on a date range
        destroyHighlight: function () {
            if (this.highlightEl) {
                this.highlightEl.remove();
                this.highlightEl = null;
            }
        },


        // Generates HTML for a table element with containers in each column, responsible for absolutely positioning the
        // highlight elements to cover the highlighted slots.
        highlightSkeletonHtml: function (start, end) {
            var view = this.view;
            var segs = this.rangeToSegs(start, end);
            var cellHtml = '';
            var col = 0;
            var i, seg;
            var dayDate;
            var top, bottom;

            for (i = 0; i < segs.length; i++) { // loop through the segments. one per column
                seg = segs[i];

                // need empty cells beforehand?
                if (col < seg.col) {
                    cellHtml += '<td colspan="' + (seg.col - col) + '"/>';
                    col = seg.col;
                }

                // compute vertical position
                dayDate = view.cellToDate(0, col);
                top = this.computeDateTop(seg.start, dayDate);
                bottom = this.computeDateTop(seg.end, dayDate); // the y position of the bottom edge

                // generate the cell HTML. bottom becomes negative because it needs to be a CSS value relative to the
                // bottom edge of the zero-height container.
                cellHtml +=
				'<td>' +
					'<div class="fc-highlight-container">' +
						'<div class="fc-highlight" style="top:' + top + 'px;bottom:-' + bottom + 'px"/>' +
					'</div>' +
				'</td>';

                col++;
            }

            // need empty cells after the last segment?
            if (col < view.colCnt) {
                cellHtml += '<td colspan="' + (view.colCnt - col) + '"/>';
            }

            cellHtml = this.bookendCells(cellHtml, 'highlight');

            return '' +
			'<div class="fc-highlight-skeleton">' +
				'<table>' +
					'<tr>' +
						cellHtml +
					'</tr>' +
				'</table>' +
			'</div>';
        }

    });

    ; ;

    /* Event-rendering methods for the TimeGrid class
    ----------------------------------------------------------------------------------------------------------------------*/

    $.extend(TimeGrid.prototype, {

        segs: null, // segment objects rendered in the component. null of events haven't been rendered yet
        eventSkeletonEl: null, // has cells with event-containers, which contain absolutely positioned event elements


        // Renders the events onto the grid and returns an array of segments that have been rendered
        renderEvents: function (events) {
            var res = this.renderEventTable(events);

            this.eventSkeletonEl = $('<div class="fc-content-skeleton"/>').append(res.tableEl);
            this.el.append(this.eventSkeletonEl);

            this.segs = res.segs;
        },


        // Retrieves rendered segment objects
        getSegs: function () {
            return this.segs || [];
        },


        // Removes all event segment elements from the view
        destroyEvents: function () {
            if (this.eventSkeletonEl) {
                this.eventSkeletonEl.remove();
                this.eventSkeletonEl = null;
            }

            this.segs = null;
        },


        // Renders and returns the <table> portion of the event-skeleton.
        // Returns an object with properties 'tbodyEl' and 'segs'.
        renderEventTable: function (events) {
            var tableEl = $('<table><tr/></table>');
            var trEl = tableEl.find('tr');
            var segs = this.eventsToSegs(events);
            var segCols;
            var i, seg;
            var col, colSegs;
            var containerEl;

            segs = this.renderSegs(segs); // returns only the visible segs
            segCols = this.groupSegCols(segs); // group into sub-arrays, and assigns 'col' to each seg

            this.computeSegVerticals(segs); // compute and assign top/bottom

            for (col = 0; col < segCols.length; col++) { // iterate each column grouping
                colSegs = segCols[col];
                placeSlotSegs(colSegs); // compute horizontal coordinates, z-index's, and reorder the array

                containerEl = $('<div class="fc-event-container"/>');

                // assign positioning CSS and insert into container
                for (i = 0; i < colSegs.length; i++) {
                    seg = colSegs[i];
                    seg.el.css(this.generateSegPositionCss(seg));

                    // if the height is short, add a className for alternate styling
                    if (seg.bottom - seg.top < 30) {
                        seg.el.addClass('fc-short');
                    }

                    containerEl.append(seg.el);
                }

                trEl.append($('<td/>').append(containerEl));
            }

            this.bookendCells(trEl, 'eventSkeleton');

            return {
                tableEl: tableEl,
                segs: segs
            };
        },


        // Refreshes the CSS top/bottom coordinates for each segment element. Probably after a window resize/zoom.
        updateSegVerticals: function () {
            var segs = this.segs;
            var i;

            if (segs) {
                this.computeSegVerticals(segs);

                for (i = 0; i < segs.length; i++) {
                    segs[i].el.css(
					this.generateSegVerticalCss(segs[i])
				);
                }
            }
        },


        // For each segment in an array, computes and assigns its top and bottom properties
        computeSegVerticals: function (segs) {
            var i, seg;

            for (i = 0; i < segs.length; i++) {
                seg = segs[i];
                seg.top = this.computeDateTop(seg.start, seg.start);
                seg.bottom = this.computeDateTop(seg.end, seg.start);
            }
        },


        // Renders the HTML for a single event segment's default rendering
        renderSegHtml: function (seg, disableResizing) {
            var view = this.view;
            var event = seg.event;
            var isDraggable = view.isEventDraggable(event);
            var isResizable = !disableResizing && seg.isEnd && view.isEventResizable(event);
            var classes = this.getSegClasses(seg, isDraggable, isResizable);
            var skinCss = this.getEventSkinCss(event);
            var timeText;
            var fullTimeText; // more verbose time text. for the print stylesheet
            var startTimeText; // just the start time text

            classes.unshift('fc-time-grid-event');

            if (view.isMultiDayEvent(event)) { // if the event appears to span more than one day...
                // Don't display time text on segments that run entirely through a day.
                // That would appear as midnight-midnight and would look dumb.
                // Otherwise, display the time text for the *segment's* times (like 6pm-midnight or midnight-10am)
                if (seg.isStart || seg.isEnd) {
                    timeText = view.getEventTimeText(seg.start, seg.end);
                    fullTimeText = view.getEventTimeText(seg.start, seg.end, 'LT');
                    startTimeText = view.getEventTimeText(seg.start, null);
                }
            } else {
                // Display the normal time text for the *event's* times
                timeText = view.getEventTimeText(event);
                fullTimeText = view.getEventTimeText(event, 'LT');
                startTimeText = view.getEventTimeText(event.start, null);
            }

            //¼æÈÝÐ¡ÓÚ30·ÖÖÓµÄÊ±ºò£¬°´30·ÖÖÓÕ¼°ë¸ñºÍÊ±¼ä·ÅÔÚ±êÌâÀïÃæ
            var timeHtml = "", titleH = "", removeClass = "";
            if (event.startTime) {
                if ((moment(event.endTime) - moment(event.startTime)) < 60 * 60 * 1000) { //Ð¡ÓÚ60·ÖÖÓ
                    timeHtml = moment(event.startTime).format('HH:mm') + " - " + moment(event.endTime).format('HH:mm');
                    removeClass = "removeClass";
                } else
                    timeHtml = htmlEscape(timeText);
            } else {
                timeHtml = htmlEscape(timeText);
            }

            var dataEnd = "";
            if (event.endTime) {
                dataEnd = moment(event.endTime).format('HH:mm');
            }
            return '<a class="' + classes.join(' ') + ' showActiveTitle"' +
			(skinCss ? ' style="' + skinCss + '"' : '') +
			'>' +
				'<div class="fc-content">' +
					(timeText ?
						'<div class="fc-time"' +
						' data-start="' + htmlEscape(startTimeText) + '"' +
                        ' data-end="' + dataEnd + '"' +
						' data-full="' + htmlEscape(fullTimeText) + '"' +
						'>' +
							'<span class="' + removeClass + '">' + timeHtml + '</span>' +
						'</div>' :
						''
						) +
					(event.title ?
						'<div class="fc-title">' +
							titleH + htmlEscape(event.title) +
						'</div>' :
						''
						) +
				'</div>' +
				'<div class="fc-bg"/>' +
				(isResizable ?
					'<div class="fc-resizer"/>' :
					''
					) +
			'</a>';
        },


        // Generates an object with CSS properties/values that should be applied to an event segment element.
        // Contains important positioning-related properties that should be applied to any event element, customized or not.
        generateSegPositionCss: function (seg) {
            var view = this.view;
            var isRTL = view.opt('isRTL');
            var shouldOverlap = view.opt('slotEventOverlap');
            var backwardCoord = seg.backwardCoord; // the left side if LTR. the right side if RTL. floating-point
            var forwardCoord = seg.forwardCoord; // the right side if LTR. the left side if RTL. floating-point
            var props = this.generateSegVerticalCss(seg); // get top/bottom first
            var left; // amount of space from left edge, a fraction of the total width
            var right; // amount of space from right edge, a fraction of the total width

            if (shouldOverlap) {
                // double the width, but don't go beyond the maximum forward coordinate (1.0)
                forwardCoord = Math.min(1, backwardCoord + (forwardCoord - backwardCoord) * 2);
            }

            if (isRTL) {
                left = 1 - forwardCoord;
                right = backwardCoord;
            }
            else {
                left = backwardCoord;
                right = 1 - forwardCoord;
            }

            props.zIndex = seg.level + 1; // convert from 0-base to 1-based
            props.left = left * 100 + '%';
            props.right = right * 100 + '%';

            if (shouldOverlap && seg.forwardPressure) {
                // add padding to the edge so that forward stacked events don't cover the resizer's icon
                props[isRTL ? 'marginLeft' : 'marginRight'] = 10 * 2; // 10 is a guesstimate of the icon's width
            }

            return props;
        },


        // Generates an object with CSS properties for the top/bottom coordinates of a segment element
        generateSegVerticalCss: function (seg) {
            return {
                top: seg.top,
                bottom: -seg.bottom // flipped because needs to be space beyond bottom edge of event container
            };
        },


        // Given a flat array of segments, return an array of sub-arrays, grouped by each segment's col
        groupSegCols: function (segs) {
            var view = this.view;
            var segCols = [];
            var i;

            for (i = 0; i < view.colCnt; i++) {
                segCols.push([]);
            }

            for (i = 0; i < segs.length; i++) {
                segCols[segs[i].col].push(segs[i]);
            }

            return segCols;
        }

    });


    // Given an array of segments that are all in the same column, sets the backwardCoord and forwardCoord on each.
    // Also reorders the given array by date!
    function placeSlotSegs(segs) {
        var levels;
        var level0;
        var i;

        segs.sort(compareSegs); // order by date
        levels = buildSlotSegLevels(segs);
        computeForwardSlotSegs(levels);

        if ((level0 = levels[0])) {

            for (i = 0; i < level0.length; i++) {
                computeSlotSegPressures(level0[i]);
            }

            for (i = 0; i < level0.length; i++) {
                computeSlotSegCoords(level0[i], 0, 0);
            }
        }
    }


    // Builds an array of segments "levels". The first level will be the leftmost tier of segments if the calendar is
    // left-to-right, or the rightmost if the calendar is right-to-left. Assumes the segments are already ordered by date.
    function buildSlotSegLevels(segs) {
        var levels = [];
        var i, seg;
        var j;

        for (i = 0; i < segs.length; i++) {
            seg = segs[i];

            // go through all the levels and stop on the first level where there are no collisions
            for (j = 0; j < levels.length; j++) {
                if (!computeSlotSegCollisions(seg, levels[j]).length) {
                    break;
                }
            }

            seg.level = j;

            (levels[j] || (levels[j] = [])).push(seg);
        }

        return levels;
    }


    // For every segment, figure out the other segments that are in subsequent
    // levels that also occupy the same vertical space. Accumulate in seg.forwardSegs
    function computeForwardSlotSegs(levels) {
        var i, level;
        var j, seg;
        var k;

        for (i = 0; i < levels.length; i++) {
            level = levels[i];

            for (j = 0; j < level.length; j++) {
                seg = level[j];

                seg.forwardSegs = [];
                for (k = i + 1; k < levels.length; k++) {
                    computeSlotSegCollisions(seg, levels[k], seg.forwardSegs);
                }
            }
        }
    }


    // Figure out which path forward (via seg.forwardSegs) results in the longest path until
    // the furthest edge is reached. The number of segments in this path will be seg.forwardPressure
    function computeSlotSegPressures(seg) {
        var forwardSegs = seg.forwardSegs;
        var forwardPressure = 0;
        var i, forwardSeg;

        if (seg.forwardPressure === undefined) { // not already computed

            for (i = 0; i < forwardSegs.length; i++) {
                forwardSeg = forwardSegs[i];

                // figure out the child's maximum forward path
                computeSlotSegPressures(forwardSeg);

                // either use the existing maximum, or use the child's forward pressure
                // plus one (for the forwardSeg itself)
                forwardPressure = Math.max(
				forwardPressure,
				1 + forwardSeg.forwardPressure
			);
            }

            seg.forwardPressure = forwardPressure;
        }
    }


    // Calculate seg.forwardCoord and seg.backwardCoord for the segment, where both values range
    // from 0 to 1. If the calendar is left-to-right, the seg.backwardCoord maps to "left" and
    // seg.forwardCoord maps to "right" (via percentage). Vice-versa if the calendar is right-to-left.
    //
    // The segment might be part of a "series", which means consecutive segments with the same pressure
    // who's width is unknown until an edge has been hit. `seriesBackwardPressure` is the number of
    // segments behind this one in the current series, and `seriesBackwardCoord` is the starting
    // coordinate of the first segment in the series.
    function computeSlotSegCoords(seg, seriesBackwardPressure, seriesBackwardCoord) {
        var forwardSegs = seg.forwardSegs;
        var i;

        if (seg.forwardCoord === undefined) { // not already computed

            if (!forwardSegs.length) {

                // if there are no forward segments, this segment should butt up against the edge
                seg.forwardCoord = 1;
            }
            else {

                // sort highest pressure first
                forwardSegs.sort(compareForwardSlotSegs);

                // this segment's forwardCoord will be calculated from the backwardCoord of the
                // highest-pressure forward segment.
                computeSlotSegCoords(forwardSegs[0], seriesBackwardPressure + 1, seriesBackwardCoord);
                seg.forwardCoord = forwardSegs[0].backwardCoord;
            }

            // calculate the backwardCoord from the forwardCoord. consider the series
            seg.backwardCoord = seg.forwardCoord -
			(seg.forwardCoord - seriesBackwardCoord) / // available width for series
			(seriesBackwardPressure + 1); // # of segments in the series

            // use this segment's coordinates to computed the coordinates of the less-pressurized
            // forward segments
            for (i = 0; i < forwardSegs.length; i++) {
                computeSlotSegCoords(forwardSegs[i], 0, seg.forwardCoord);
            }
        }
    }


    // Find all the segments in `otherSegs` that vertically collide with `seg`.
    // Append into an optionally-supplied `results` array and return.
    function computeSlotSegCollisions(seg, otherSegs, results) {
        results = results || [];

        for (var i = 0; i < otherSegs.length; i++) {
            if (isSlotSegCollision(seg, otherSegs[i])) {
                results.push(otherSegs[i]);
            }
        }

        return results;
    }


    // Do these segments occupy the same vertical space?
    function isSlotSegCollision(seg1, seg2) {
        return seg1.bottom > seg2.top && seg1.top < seg2.bottom;
    }


    // A cmp function for determining which forward segment to rely on more when computing coordinates.
    function compareForwardSlotSegs(seg1, seg2) {
        // put higher-pressure first
        return seg2.forwardPressure - seg1.forwardPressure ||
        // put segments that are closer to initial edge first (and favor ones with no coords yet)
		(seg1.backwardCoord || 0) - (seg2.backwardCoord || 0) ||
        // do normal sorting...
		compareSegs(seg1, seg2);
    }

    ; ;

    /* An abstract class from which other views inherit from
    ----------------------------------------------------------------------------------------------------------------------*/
    // Newer methods should be written as prototype methods, not in the monster `View` function at the bottom.

    View.prototype = {

        calendar: null, // owner Calendar object
        coordMap: null, // a CoordMap object for converting pixel regions to dates
        el: null, // the view's containing element. set by Calendar

        // important Moments
        start: null, // the date of the very first cell
        end: null, // the date after the very last cell
        intervalStart: null, // the start of the interval of time the view represents (1st of month for month view)
        intervalEnd: null, // the exclusive end of the interval of time the view represents

        // used for cell-to-date and date-to-cell calculations
        rowCnt: null, // # of weeks
        colCnt: null, // # of days displayed in a week

        isSelected: false, // boolean whether cells are user-selected or not

        // subclasses can optionally use a scroll container
        scrollerEl: null, // the element that will most likely scroll when content is too tall
        scrollTop: null, // cached vertical scroll value

        // classNames styled by jqui themes
        widgetHeaderClass: null,
        widgetContentClass: null,
        highlightStateClass: null,

        // document handlers, bound to `this` object
        documentMousedownProxy: null,
        documentDragStartProxy: null,


        // Serves as a "constructor" to suppliment the monster `View` constructor below
        init: function () {
            var tm = this.opt('theme') ? 'ui' : 'fc';

            this.widgetHeaderClass = tm + '-widget-header';
            this.widgetContentClass = tm + '-widget-content';
            this.highlightStateClass = tm + '-state-highlight';

            // save references to `this`-bound handlers
            this.documentMousedownProxy = $.proxy(this, 'documentMousedown');
            this.documentDragStartProxy = $.proxy(this, 'documentDragStart');
        },


        // Renders the view inside an already-defined `this.el`.
        // Subclasses should override this and then call the super method afterwards.
        render: function () {
            this.updateSize();
            this.trigger('viewRender', this, this, this.el);

            // attach handlers to document. do it here to allow for destroy/rerender
            $(document)
			.on('mousedown', this.documentMousedownProxy)
			.on('dragstart', this.documentDragStartProxy); // jqui drag
        },


        // Clears all view rendering, event elements, and unregisters handlers
        destroy: function () {
            this.unselect();
            this.trigger('viewDestroy', this, this, this.el);
            this.destroyEvents();
            this.el.empty(); // removes inner contents but leaves the element intact

            $(document)
			.off('mousedown', this.documentMousedownProxy)
			.off('dragstart', this.documentDragStartProxy);
        },


        // Used to determine what happens when the users clicks next/prev. Given -1 for prev, 1 for next.
        // Should apply the delta to `date` (a Moment) and return it.
        incrementDate: function (date, delta) {
            // subclasses should implement
        },


        /* Dimensions
        ------------------------------------------------------------------------------------------------------------------*/


        // Refreshes anything dependant upon sizing of the container element of the grid
        updateSize: function (isResize) {
            if (isResize) {
                this.recordScroll();
            }
            this.updateHeight();
            this.updateWidth();
        },


        // Refreshes the horizontal dimensions of the calendar
        updateWidth: function () {
            // subclasses should implement
        },


        // Refreshes the vertical dimensions of the calendar
        updateHeight: function () {
            var calendar = this.calendar; // we poll the calendar for height information

            this.setHeight(
			calendar.getSuggestedViewHeight(),
			calendar.isHeightAuto()
		);
        },


        // Updates the vertical dimensions of the calendar to the specified height.
        // if `isAuto` is set to true, height becomes merely a suggestion and the view should use its "natural" height.
        setHeight: function (height, isAuto) {
            // subclasses should implement
        },


        // Given the total height of the view, return the number of pixels that should be used for the scroller.
        // Utility for subclasses.
        computeScrollerHeight: function (totalHeight) {
            var both = this.el.add(this.scrollerEl);
            var otherHeight; // cumulative height of everything that is not the scrollerEl in the view (header+borders)

            // fuckin IE8/9/10/11 sometimes returns 0 for dimensions. this weird hack was the only thing that worked
            both.css({
                position: 'relative', // cause a reflow, which will force fresh dimension recalculation
                left: -1 // ensure reflow in case the el was already relative. negative is less likely to cause new scroll
            });
            otherHeight = this.el.outerHeight() - this.scrollerEl.height(); // grab the dimensions
            both.css({ position: '', left: '' }); // undo hack

            return totalHeight - otherHeight;
        },


        // Called for remembering the current scroll value of the scroller.
        // Should be called before there is a destructive operation (like removing DOM elements) that might inadvertently
        // change the scroll of the container.
        recordScroll: function () {
            if (this.scrollerEl) {
                this.scrollTop = this.scrollerEl.scrollTop();
            }
        },


        // Set the scroll value of the scroller to the previously recorded value.
        // Should be called after we know the view's dimensions have been restored following some type of destructive
        // operation (like temporarily removing DOM elements).
        restoreScroll: function () {
            if (this.scrollTop !== null) {
                this.scrollerEl.scrollTop(this.scrollTop);
            }
        },


        /* Events
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders the events onto the view.
        // Should be overriden by subclasses. Subclasses should call the super-method afterwards.
        renderEvents: function (events) {
            this.segEach(function (seg) {
                this.trigger('eventAfterRender', seg.event, seg.event, seg.el);
            });
            this.trigger('eventAfterAllRender');
        },


        // Removes event elements from the view.
        // Should be overridden by subclasses. Should call this super-method FIRST, then subclass DOM destruction.
        destroyEvents: function () {
            this.segEach(function (seg) {
                this.trigger('eventDestroy', seg.event, seg.event, seg.el);
            });
        },


        // Given an event and the default element used for rendering, returns the element that should actually be used.
        // Basically runs events and elements through the eventRender hook.
        resolveEventEl: function (event, el) {
            var custom = this.trigger('eventRender', event, event, el);

            if (custom === false) { // means don't render at all
                el = null;
            }
            else if (custom && custom !== true) {
                el = $(custom);
            }

            return el;
        },


        // Hides all rendered event segments linked to the given event
        showEvent: function (event) {
            this.segEach(function (seg) {
                seg.el.css('visibility', '');
            }, event);
        },


        // Shows all rendered event segments linked to the given event
        hideEvent: function (event) {
            this.segEach(function (seg) {
                seg.el.css('visibility', 'hidden');
            }, event);
        },


        // Iterates through event segments. Goes through all by default.
        // If the optional `event` argument is specified, only iterates through segments linked to that event.
        // The `this` value of the callback function will be the view.
        segEach: function (func, event) {
            var segs = this.getSegs();
            var i;

            for (i = 0; i < segs.length; i++) {
                if (!event || segs[i].event._id === event._id) {
                    func.call(this, segs[i]);
                }
            }
        },


        // Retrieves all the rendered segment objects for the view
        getSegs: function () {
            // subclasses must implement
        },


        /* Event Drag Visualization
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event hovering over the specified date.
        // `end` is a Moment and might be null.
        // `seg` might be null. if specified, it is the segment object of the event being dragged.
        //       otherwise, an external event from outside the calendar is being dragged.
        renderDrag: function (start, end, seg) {
            // subclasses should implement
        },


        // Unrenders a visual indication of event hovering
        destroyDrag: function () {
            // subclasses should implement
        },


        // Handler for accepting externally dragged events being dropped in the view.
        // Gets called when jqui's 'dragstart' is fired.
        documentDragStart: function (ev, ui) {
            var _this = this;
            var dropDate = null;
            var dragListener;

            if (this.opt('droppable')) { // only listen if this setting is on

                // listener that tracks mouse movement over date-associated pixel regions
                dragListener = new DragListener(this.coordMap, {
                    cellOver: function (cell, date) {
                        dropDate = date;
                        _this.renderDrag(date);
                    },
                    cellOut: function () {
                        dropDate = null;
                        _this.destroyDrag();
                    }
                });

                // gets called, only once, when jqui drag is finished
                $(document).one('dragstop', function (ev, ui) {
                    _this.destroyDrag();
                    if (dropDate) {
                        _this.trigger('drop', ev.target, dropDate, ev, ui);
                    }
                });

                dragListener.startDrag(ev); // start listening immediately
            }
        },


        /* Selection
        ------------------------------------------------------------------------------------------------------------------*/


        // Selects a date range on the view. `start` and `end` are both Moments.
        // `ev` is the native mouse event that begin the interaction.
        select: function (start, end, ev) {
            this.unselect(ev);
            this.renderSelection(start, end);
            this.reportSelection(start, end, ev);
        },


        // Renders a visual indication of the selection
        renderSelection: function (start, end) {
            // subclasses should implement
        },


        // Called when a new selection is made. Updates internal state and triggers handlers.
        reportSelection: function (start, end, ev) {
            this.isSelected = true;
            this.trigger('select', null, start, end, ev);
        },


        // Undoes a selection. updates in the internal state and triggers handlers.
        // `ev` is the native mouse event that began the interaction.
        unselect: function (ev) {
            if (this.isSelected) {
                this.isSelected = false;
                this.destroySelection();
                this.trigger('unselect', null, ev);
            }
        },


        // Unrenders a visual indication of selection
        destroySelection: function () {
            // subclasses should implement
        },


        // Handler for unselecting when the user clicks something and the 'unselectAuto' setting is on
        documentMousedown: function (ev) {
            var ignore;

            // is there a selection, and has the user made a proper left click?
            if (this.isSelected && this.opt('unselectAuto') && isPrimaryMouseButton(ev)) {

                // only unselect if the clicked element is not identical to or inside of an 'unselectCancel' element
                ignore = this.opt('unselectCancel');
                if (!ignore || !$(ev.target).closest(ignore).length) {
                    this.unselect(ev);
                }
            }
        }

    };


    // We are mixing JavaScript OOP design patterns here by putting methods and member variables in the closed scope of the
    // constructor. Going forward, methods should be part of the prototype.
    function View(calendar) {
        var t = this;

        // exports
        t.calendar = calendar;
        t.opt = opt;
        t.trigger = trigger;
        t.isEventDraggable = isEventDraggable;
        t.isEventResizable = isEventResizable;
        t.eventDrop = eventDrop;
        t.eventResize = eventResize;

        // imports
        var reportEventChange = calendar.reportEventChange;

        // locals
        var options = calendar.options;
        var nextDayThreshold = moment.duration(options.nextDayThreshold);


        t.init(); // the "constructor" that concerns the prototype methods


        function opt(name) {
            var v = options[name];
            if ($.isPlainObject(v) && !isForcedAtomicOption(name)) {
                return smartProperty(v, t.name);
            }
            return v;
        }


        function trigger(name, thisObj) {
            return calendar.trigger.apply(
			calendar,
			[name, thisObj || t].concat(Array.prototype.slice.call(arguments, 2), [t])
		);
        }



        /* Event Editable Boolean Calculations
        ------------------------------------------------------------------------------*/


        function isEventDraggable(event) {
            var source = event.source || {};

            return firstDefined(
			event.startEditable,
			source.startEditable,
			opt('eventStartEditable'),
			event.editable,
			source.editable,
			opt('editable')
		);
        }


        function isEventResizable(event) {
            var source = event.source || {};

            return firstDefined(
			event.durationEditable,
			source.durationEditable,
			opt('eventDurationEditable'),
			event.editable,
			source.editable,
			opt('editable')
		);
        }



        /* Event Elements
        ------------------------------------------------------------------------------*/


        // Compute the text that should be displayed on an event's element.
        // Based off the settings of the view. Possible signatures:
        //   .getEventTimeText(event, formatStr)
        //   .getEventTimeText(startMoment, endMoment, formatStr)
        //   .getEventTimeText(startMoment, null, formatStr)
        // `timeFormat` is used but the `formatStr` argument can be used to override.
        t.getEventTimeText = function (event, formatStr) {
            var start;
            var end;

            if (typeof event === 'object' && typeof formatStr === 'object') {
                // first two arguments are actually moments (or null). shift arguments.
                start = event;
                end = formatStr;
                formatStr = arguments[2];
            }
            else {
                // otherwise, an event object was the first argument
                start = event.start;
                end = event.end;
            }

            formatStr = formatStr || opt('timeFormat');

            if (end && opt('displayEventEnd')) {
                return calendar.formatRange(start, end, formatStr);
            }
            else {
                return calendar.formatDate(start, formatStr);
            }
        };



        /* Event Modification Reporting
        ---------------------------------------------------------------------------------*/


        function eventDrop(el, event, newStart, ev) {
            var mutateResult = calendar.mutateEvent(event, newStart, null);

            trigger(
			'eventDrop',
			el,
			event,
			mutateResult.dateDelta,
			function () {
			    mutateResult.undo();
			    reportEventChange();
			},
			ev,
			{} // jqui dummy
		);

            reportEventChange();
        }


        function eventResize(el, event, newEnd, ev) {
            var mutateResult = calendar.mutateEvent(event, null, newEnd);

            trigger(
			'eventResize',
			el,
			event,
			mutateResult.durationDelta,
			function () {
			    mutateResult.undo();
			    reportEventChange();
			},
			ev,
			{} // jqui dummy
		);

            reportEventChange();
        }


        // ====================================================================================================
        // Utilities for day "cells"
        // ====================================================================================================
        // The "basic" views are completely made up of day cells.
        // The "agenda" views have day cells at the top "all day" slot.
        // This was the obvious common place to put these utilities, but they should be abstracted out into
        // a more meaningful class (like DayEventRenderer).
        // ====================================================================================================


        // For determining how a given "cell" translates into a "date":
        //
        // 1. Convert the "cell" (row and column) into a "cell offset" (the # of the cell, cronologically from the first).
        //    Keep in mind that column indices are inverted with isRTL. This is taken into account.
        //
        // 2. Convert the "cell offset" to a "day offset" (the # of days since the first visible day in the view).
        //
        // 3. Convert the "day offset" into a "date" (a Moment).
        //
        // The reverse transformation happens when transforming a date into a cell.


        // exports
        t.isHiddenDay = isHiddenDay;
        t.skipHiddenDays = skipHiddenDays;
        t.getCellsPerWeek = getCellsPerWeek;
        t.dateToCell = dateToCell;
        t.dateToDayOffset = dateToDayOffset;
        t.dayOffsetToCellOffset = dayOffsetToCellOffset;
        t.cellOffsetToCell = cellOffsetToCell;
        t.cellToDate = cellToDate;
        t.cellToCellOffset = cellToCellOffset;
        t.cellOffsetToDayOffset = cellOffsetToDayOffset;
        t.dayOffsetToDate = dayOffsetToDate;
        t.rangeToSegments = rangeToSegments;
        t.isMultiDayEvent = isMultiDayEvent;


        // internals
        var hiddenDays = opt('hiddenDays') || []; // array of day-of-week indices that are hidden
        var isHiddenDayHash = []; // is the day-of-week hidden? (hash with day-of-week-index -> bool)
        var cellsPerWeek;
        var dayToCellMap = []; // hash from dayIndex -> cellIndex, for one week
        var cellToDayMap = []; // hash from cellIndex -> dayIndex, for one week
        var isRTL = opt('isRTL');


        // initialize important internal variables
        (function () {

            if (opt('weekends') === false) {
                hiddenDays.push(0, 6); // 0=sunday, 6=saturday
            }

            // Loop through a hypothetical week and determine which
            // days-of-week are hidden. Record in both hashes (one is the reverse of the other).
            for (var dayIndex = 0, cellIndex = 0; dayIndex < 7; dayIndex++) {
                dayToCellMap[dayIndex] = cellIndex;
                isHiddenDayHash[dayIndex] = $.inArray(dayIndex, hiddenDays) != -1;
                if (!isHiddenDayHash[dayIndex]) {
                    cellToDayMap[cellIndex] = dayIndex;
                    cellIndex++;
                }
            }

            cellsPerWeek = cellIndex;
            if (!cellsPerWeek) {
                throw 'invalid hiddenDays'; // all days were hidden? bad.
            }

        })();


        // Is the current day hidden?
        // `day` is a day-of-week index (0-6), or a Moment
        function isHiddenDay(day) {
            if (moment.isMoment(day)) {
                day = day.day();
            }
            return isHiddenDayHash[day];
        }


        function getCellsPerWeek() {
            return cellsPerWeek;
        }


        // Incrementing the current day until it is no longer a hidden day, returning a copy.
        // If the initial value of `date` is not a hidden day, don't do anything.
        // Pass `isExclusive` as `true` if you are dealing with an end date.
        // `inc` defaults to `1` (increment one day forward each time)
        function skipHiddenDays(date, inc, isExclusive) {
            var out = date.clone();
            inc = inc || 1;
            while (
			isHiddenDayHash[(out.day() + (isExclusive ? inc : 0) + 7) % 7]
		) {
                out.add(inc, 'days');
            }
            return out;
        }


        //
        // TRANSFORMATIONS: cell -> cell offset -> day offset -> date
        //

        // cell -> date (combines all transformations)
        // Possible arguments:
        // - row, col
        // - { row:#, col: # }
        function cellToDate() {
            var cellOffset = cellToCellOffset.apply(null, arguments);
            var dayOffset = cellOffsetToDayOffset(cellOffset);
            var date = dayOffsetToDate(dayOffset);
            return date;
        }

        // cell -> cell offset
        // Possible arguments:
        // - row, col
        // - { row:#, col:# }
        function cellToCellOffset(row, col) {
            var colCnt = t.colCnt;

            // rtl variables. wish we could pre-populate these. but where?
            var dis = isRTL ? -1 : 1;
            var dit = isRTL ? colCnt - 1 : 0;

            if (typeof row == 'object') {
                col = row.col;
                row = row.row;
            }
            var cellOffset = row * colCnt + (col * dis + dit); // column, adjusted for RTL (dis & dit)

            return cellOffset;
        }

        // cell offset -> day offset
        function cellOffsetToDayOffset(cellOffset) {
            var day0 = t.start.day(); // first date's day of week
            cellOffset += dayToCellMap[day0]; // normlize cellOffset to beginning-of-week
            return Math.floor(cellOffset / cellsPerWeek) * 7 + // # of days from full weeks
			cellToDayMap[ // # of days from partial last week
				(cellOffset % cellsPerWeek + cellsPerWeek) % cellsPerWeek // crazy math to handle negative cellOffsets
			] -
			day0; // adjustment for beginning-of-week normalization
        }

        // day offset -> date
        function dayOffsetToDate(dayOffset) {
            return t.start.clone().add(dayOffset, 'days');
        }


        //
        // TRANSFORMATIONS: date -> day offset -> cell offset -> cell
        //

        // date -> cell (combines all transformations)
        function dateToCell(date) {
            var dayOffset = dateToDayOffset(date);
            var cellOffset = dayOffsetToCellOffset(dayOffset);
            var cell = cellOffsetToCell(cellOffset);
            return cell;
        }

        // date -> day offset
        function dateToDayOffset(date) {
            return date.clone().stripTime().diff(t.start, 'days');
        }

        // day offset -> cell offset
        function dayOffsetToCellOffset(dayOffset) {
            var day0 = t.start.day(); // first date's day of week
            dayOffset += day0; // normalize dayOffset to beginning-of-week
            return Math.floor(dayOffset / 7) * cellsPerWeek + // # of cells from full weeks
			dayToCellMap[ // # of cells from partial last week
				(dayOffset % 7 + 7) % 7 // crazy math to handle negative dayOffsets
			] -
			dayToCellMap[day0]; // adjustment for beginning-of-week normalization
        }

        // cell offset -> cell (object with row & col keys)
        function cellOffsetToCell(cellOffset) {
            var colCnt = t.colCnt;

            // rtl variables. wish we could pre-populate these. but where?
            var dis = isRTL ? -1 : 1;
            var dit = isRTL ? colCnt - 1 : 0;

            var row = Math.floor(cellOffset / colCnt);
            var col = ((cellOffset % colCnt + colCnt) % colCnt) * dis + dit; // column, adjusted for RTL (dis & dit)
            return {
                row: row,
                col: col
            };
        }


        //
        // Converts a date range into an array of segment objects.
        // "Segments" are horizontal stretches of time, sliced up by row.
        // A segment object has the following properties:
        // - row
        // - cols
        // - isStart
        // - isEnd
        //
        function rangeToSegments(start, end) {

            var rowCnt = t.rowCnt;
            var colCnt = t.colCnt;
            var segments = []; // array of segments to return

            // day offset for given date range
            var dayRange = computeDayRange(start, end); // convert to a whole-day range
            var rangeDayOffsetStart = dateToDayOffset(dayRange.start);
            var rangeDayOffsetEnd = dateToDayOffset(dayRange.end); // an exclusive value

            // first and last cell offset for the given date range
            // "last" implies inclusivity
            var rangeCellOffsetFirst = dayOffsetToCellOffset(rangeDayOffsetStart);
            var rangeCellOffsetLast = dayOffsetToCellOffset(rangeDayOffsetEnd) - 1;

            // loop through all the rows in the view
            for (var row = 0; row < rowCnt; row++) {

                // first and last cell offset for the row
                var rowCellOffsetFirst = row * colCnt;
                var rowCellOffsetLast = rowCellOffsetFirst + colCnt - 1;

                // get the segment's cell offsets by constraining the range's cell offsets to the bounds of the row
                var segmentCellOffsetFirst = Math.max(rangeCellOffsetFirst, rowCellOffsetFirst);
                var segmentCellOffsetLast = Math.min(rangeCellOffsetLast, rowCellOffsetLast);

                // make sure segment's offsets are valid and in view
                if (segmentCellOffsetFirst <= segmentCellOffsetLast) {

                    // translate to cells
                    var segmentCellFirst = cellOffsetToCell(segmentCellOffsetFirst);
                    var segmentCellLast = cellOffsetToCell(segmentCellOffsetLast);

                    // view might be RTL, so order by leftmost column
                    var cols = [segmentCellFirst.col, segmentCellLast.col].sort();

                    // Determine if segment's first/last cell is the beginning/end of the date range.
                    // We need to compare "day offset" because "cell offsets" are often ambiguous and
                    // can translate to multiple days, and an edge case reveals itself when we the
                    // range's first cell is hidden (we don't want isStart to be true).
                    var isStart = cellOffsetToDayOffset(segmentCellOffsetFirst) == rangeDayOffsetStart;
                    var isEnd = cellOffsetToDayOffset(segmentCellOffsetLast) + 1 == rangeDayOffsetEnd;
                    // +1 for comparing exclusively

                    segments.push({
                        row: row,
                        leftCol: cols[0],
                        rightCol: cols[1],
                        isStart: isStart,
                        isEnd: isEnd
                    });
                }
            }

            return segments;
        }


        // Returns the date range of the full days the given range visually appears to occupy.
        // Returns object with properties `start` (moment) and `end` (moment, exclusive end).
        function computeDayRange(start, end) {
            var startDay = start.clone().stripTime(); // the beginning of the day the range starts
            var endDay;
            var endTimeMS;

            if (end) {
                endDay = end.clone().stripTime(); // the beginning of the day the range exclusively ends
                endTimeMS = +end.time(); // # of milliseconds into `endDay`

                // If the end time is actually inclusively part of the next day and is equal to or
                // beyond the next day threshold, adjust the end to be the exclusive end of `endDay`.
                // Otherwise, leaving it as inclusive will cause it to exclude `endDay`.
                if (endTimeMS && endTimeMS >= nextDayThreshold) {
                    endDay.add(1, 'days');
                }
            }

            // If no end was specified, or if it is within `startDay` but not past nextDayThreshold,
            // assign the default duration of one day.
            if (!end || endDay <= startDay) {
                endDay = startDay.clone().add(1, 'days');
            }

            return { start: startDay, end: endDay };
        }


        // Does the given event visually appear to occupy more than one day?
        function isMultiDayEvent(event) {
            var range = computeDayRange(event.start, event.end);

            return range.end.diff(range.start, 'days') > 1;
        }

    }

    ; ;

    /* An abstract class for the "basic" views, as well as month view. Renders one or more rows of day cells.
    ----------------------------------------------------------------------------------------------------------------------*/
    // It is a manager for a DayGrid subcomponent, which does most of the heavy lifting.
    // It is responsible for managing width/height.

    function BasicView(calendar) {
        View.call(this, calendar); // call the super-constructor
        this.dayGrid = new DayGrid(this);
        this.coordMap = this.dayGrid.coordMap; // the view's date-to-cell mapping is identical to the subcomponent's
    }


    BasicView.prototype = createObject(View.prototype); // define the super-class
    $.extend(BasicView.prototype, {

        dayGrid: null, // the main subcomponent that does most of the heavy lifting

        dayNumbersVisible: false, // display day numbers on each day cell?
        weekNumbersVisible: false, // display week numbers along the side?

        weekNumberWidth: null, // width of all the week-number cells running down the side

        headRowEl: null, // the fake row element of the day-of-week header


        // Renders the view into `this.el`, which should already be assigned.
        // rowCnt, colCnt, and dayNumbersVisible have been calculated by a subclass and passed here.
        render: function (rowCnt, colCnt, dayNumbersVisible) {

            // needed for cell-to-date and date-to-cell calculations in View
            this.rowCnt = rowCnt;
            this.colCnt = colCnt;

            this.dayNumbersVisible = dayNumbersVisible;
            this.weekNumbersVisible = this.opt('weekNumbers');
            this.dayGrid.numbersVisible = this.dayNumbersVisible || this.weekNumbersVisible;

            this.el.addClass('fc-basic-view').html(this.renderHtml());

            this.headRowEl = this.el.find('thead .fc-row');

            this.scrollerEl = this.el.find('.fc-day-grid-container');
            this.dayGrid.coordMap.containerEl = this.scrollerEl; // constrain clicks/etc to the dimensions of the scroller

            this.dayGrid.el = this.el.find('.fc-day-grid');
            this.dayGrid.render(this.hasRigidRows());

            View.prototype.render.call(this); // call the super-method
        },


        // Make subcomponents ready for cleanup
        destroy: function () {
            this.dayGrid.destroy();
            View.prototype.destroy.call(this); // call the super-method
        },


        // Builds the HTML skeleton for the view.
        // The day-grid component will render inside of a container defined by this HTML.
        renderHtml: function () {
            return '' +
			'<table>' +
				'<thead>' +
					'<tr>' +
						'<td class="' + this.widgetHeaderClass + '">' +
							this.dayGrid.headHtml() + // render the day-of-week headers
						'</td>' +
					'</tr>' +
				'</thead>' +
				'<tbody>' +
					'<tr>' +
						'<td class="' + this.widgetContentClass + '">' +
							'<div class="fc-day-grid-container">' +
								'<div class="fc-day-grid"/>' +
							'</div>' +
						'</td>' +
					'</tr>' +
				'</tbody>' +
			'</table>';
        },


        // Generates the HTML that will go before the day-of week header cells.
        // Queried by the DayGrid subcomponent when generating rows. Ordering depends on isRTL.
        headIntroHtml: function () {
            if (this.weekNumbersVisible) {
                return '' +
				'<th class="fc-week-number ' + this.widgetHeaderClass + '" ' + this.weekNumberStyleAttr() + '>' +
					'<span>' + // needed for matchCellWidths
						htmlEscape(this.opt('weekNumberTitle')) +
					'</span>' +
				'</th>';
            }
        },


        // Generates the HTML that will go before content-skeleton cells that display the day/week numbers.
        // Queried by the DayGrid subcomponent. Ordering depends on isRTL.
        numberIntroHtml: function (row) {
            if (this.weekNumbersVisible) {
                return '' +
				'<td class="fc-week-number" ' + this.weekNumberStyleAttr() + '>' +
					'<span>' + // needed for matchCellWidths
						this.calendar.calculateWeekNumber(this.cellToDate(row, 0)) +
					'</span>' +
				'</td>';
            }
        },


        // Generates the HTML that goes before the day bg cells for each day-row.
        // Queried by the DayGrid subcomponent. Ordering depends on isRTL.
        dayIntroHtml: function () {
            if (this.weekNumbersVisible) {
                return '<td class="fc-week-number ' + this.widgetContentClass + '" ' +
				this.weekNumberStyleAttr() + '></td>';
            }
        },


        // Generates the HTML that goes before every other type of row generated by DayGrid. Ordering depends on isRTL.
        // Affects helper-skeleton and highlight-skeleton rows.
        introHtml: function () {
            if (this.weekNumbersVisible) {
                return '<td class="fc-week-number" ' + this.weekNumberStyleAttr() + '></td>';
            }
        },


        // Generates the HTML for the <td>s of the "number" row in the DayGrid's content skeleton.
        // The number row will only exist if either day numbers or week numbers are turned on.
        numberCellHtml: function (row, col, date) {
            var classes;

            if (!this.dayNumbersVisible) { // if there are week numbers but not day numbers
                return '<td/>'; //  will create an empty space above events :(
            }

            classes = this.dayGrid.getDayClasses(date);
            classes.unshift('fc-day-number');

            return '' +
			'<td class="' + classes.join(' ') + '" data-date="' + date.format() + '">' +
				date.date() +
			'</td>';
        },


        // Generates an HTML attribute string for setting the width of the week number column, if it is known
        weekNumberStyleAttr: function () {
            if (this.weekNumberWidth !== null) {
                return 'style="width:' + this.weekNumberWidth + 'px"';
            }
            return '';
        },


        // Determines whether each row should have a constant height
        hasRigidRows: function () {
            var eventLimit = this.opt('eventLimit');
            return eventLimit && typeof eventLimit !== 'number';
        },


        /* Dimensions
        ------------------------------------------------------------------------------------------------------------------*/


        // Refreshes the horizontal dimensions of the view
        updateWidth: function () {
            if (this.weekNumbersVisible) {
                // Make sure all week number cells running down the side have the same width.
                // Record the width for cells created later.
                this.weekNumberWidth = matchCellWidths(
				this.el.find('.fc-week-number')
			);
            }
        },


        // Adjusts the vertical dimensions of the view to the specified values
        setHeight: function (totalHeight, isAuto) {
            var eventLimit = this.opt('eventLimit');
            var scrollerHeight;

            // reset all heights to be natural
            unsetScroller(this.scrollerEl);
            uncompensateScroll(this.headRowEl);

            this.dayGrid.destroySegPopover(); // kill the "more" popover if displayed

            // is the event limit a constant level number?
            if (eventLimit && typeof eventLimit === 'number') {
                this.dayGrid.limitRows(eventLimit); // limit the levels first so the height can redistribute after
            }

            scrollerHeight = this.computeScrollerHeight(totalHeight);
            this.setGridHeight(scrollerHeight, isAuto);

            // is the event limit dynamically calculated?
            if (eventLimit && typeof eventLimit !== 'number') {
                this.dayGrid.limitRows(eventLimit); // limit the levels after the grid's row heights have been set
            }

            if (!isAuto && setPotentialScroller(this.scrollerEl, scrollerHeight)) { // using scrollbars?

                compensateScroll(this.headRowEl, getScrollbarWidths(this.scrollerEl));

                // doing the scrollbar compensation might have created text overflow which created more height. redo
                scrollerHeight = this.computeScrollerHeight(totalHeight);
                this.scrollerEl.height(scrollerHeight);

                this.restoreScroll();
            }
        },


        // Sets the height of just the DayGrid component in this view
        setGridHeight: function (height, isAuto) {
            if (isAuto) {
                undistributeHeight(this.dayGrid.rowEls); // let the rows be their natural height with no expanding
            }
            else {
                distributeHeight(this.dayGrid.rowEls, height, true); // true = compensate for height-hogging rows
            }
        },


        /* Events
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders the given events onto the view and populates the segments array
        renderEvents: function (events) {
            this.dayGrid.renderEvents(events);

            this.updateHeight(); // must compensate for events that overflow the row

            View.prototype.renderEvents.call(this, events); // call the super-method
        },


        // Retrieves all segment objects that are rendered in the view
        getSegs: function () {
            return this.dayGrid.getSegs();
        },


        // Unrenders all event elements and clears internal segment data
        destroyEvents: function () {
            View.prototype.destroyEvents.call(this); // do this before dayGrid's segs have been cleared

            this.recordScroll(); // removing events will reduce height and mess with the scroll, so record beforehand
            this.dayGrid.destroyEvents();

            // we DON'T need to call updateHeight() because:
            // A) a renderEvents() call always happens after this, which will eventually call updateHeight()
            // B) in IE8, this causes a flash whenever events are rerendered
        },


        /* Event Dragging
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event being dragged over the view.
        // A returned value of `true` signals that a mock "helper" event has been rendered.
        renderDrag: function (start, end, seg) {
            return this.dayGrid.renderDrag(start, end, seg);
        },


        // Unrenders the visual indication of an event being dragged over the view
        destroyDrag: function () {
            this.dayGrid.destroyDrag();
        },


        /* Selection
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of a selection
        renderSelection: function (start, end) {
            this.dayGrid.renderSelection(start, end);
        },


        // Unrenders a visual indications of a selection
        destroySelection: function () {
            this.dayGrid.destroySelection();
        }

    });

    ; ;

    /* A month view with day cells running in rows (one-per-week) and columns
    ----------------------------------------------------------------------------------------------------------------------*/

    setDefaults({
        fixedWeekCount: true
    });

    fcViews.month = MonthView; // register the view

    function MonthView(calendar) {
        BasicView.call(this, calendar); // call the super-constructor
    }


    MonthView.prototype = createObject(BasicView.prototype); // define the super-class
    $.extend(MonthView.prototype, {

        name: 'month',


        incrementDate: function (date, delta) {
            return date.clone().stripTime().add(delta, 'months').startOf('month');
        },


        render: function (date) {
            var rowCnt;

            this.intervalStart = date.clone().stripTime().startOf('month');
            this.intervalEnd = this.intervalStart.clone().add(1, 'months');

            this.start = this.intervalStart.clone();
            this.start = this.skipHiddenDays(this.start); // move past the first week if no visible days
            this.start.startOf('week');
            this.start = this.skipHiddenDays(this.start); // move past the first invisible days of the week

            this.end = this.intervalEnd.clone();
            this.end = this.skipHiddenDays(this.end, -1, true); // move in from the last week if no visible days
            this.end.add((7 - this.end.weekday()) % 7, 'days'); // move to end of week if not already
            this.end = this.skipHiddenDays(this.end, -1, true); // move in from the last invisible days of the week

            rowCnt = Math.ceil( // need to ceil in case there are hidden days
			this.end.diff(this.start, 'weeks', true) // returnfloat=true
		);
            if (this.isFixedWeeks()) {
                this.end.add(6 - rowCnt, 'weeks');
                rowCnt = 6;
            }

            this.title = this.calendar.formatDate(this.intervalStart, this.opt('titleFormat'));

            BasicView.prototype.render.call(this, rowCnt, this.getCellsPerWeek(), true); // call the super-method
        },


        // Overrides the default BasicView behavior to have special multi-week auto-height logic
        setGridHeight: function (height, isAuto) {

            isAuto = isAuto || this.opt('weekMode') === 'variable'; // LEGACY: weekMode is deprecated

            // if auto, make the height of each row the height that it would be if there were 6 weeks
            if (isAuto) {
                height *= this.rowCnt / 6;
            }

            distributeHeight(this.dayGrid.rowEls, height, !isAuto); // if auto, don't compensate for height-hogging rows
        },


        isFixedWeeks: function () {
            var weekMode = this.opt('weekMode'); // LEGACY: weekMode is deprecated
            if (weekMode) {
                return weekMode === 'fixed'; // if any other type of weekMode, assume NOT fixed
            }

            return this.opt('fixedWeekCount');
        }

    });

    ; ;

    /* A week view with simple day cells running horizontally
    ----------------------------------------------------------------------------------------------------------------------*/
    // TODO: a WeekView mixin for calculating dates and titles

    fcViews.basicWeek = BasicWeekView; // register this view

    function BasicWeekView(calendar) {
        BasicView.call(this, calendar); // call the super-constructor
    }


    BasicWeekView.prototype = createObject(BasicView.prototype); // define the super-class
    $.extend(BasicWeekView.prototype, {

        name: 'basicWeek',


        incrementDate: function (date, delta) {
            return date.clone().stripTime().add(delta, 'weeks').startOf('week');
        },


        render: function (date) {

            this.intervalStart = date.clone().stripTime().startOf('week');
            this.intervalEnd = this.intervalStart.clone().add(1, 'weeks');

            this.start = this.skipHiddenDays(this.intervalStart);
            this.end = this.skipHiddenDays(this.intervalEnd, -1, true);

            this.title = this.calendar.formatRange(
			this.start,
			this.end.clone().subtract(1), // make inclusive by subtracting 1 ms
			this.opt('titleFormat'),
			' \u2014 ' // emphasized dash
		);

            BasicView.prototype.render.call(this, 1, this.getCellsPerWeek(), false); // call the super-method
        }

    });
    ; ;

    /* A view with a single simple day cell
    ----------------------------------------------------------------------------------------------------------------------*/

    fcViews.basicDay = BasicDayView; // register this view

    function BasicDayView(calendar) {
        BasicView.call(this, calendar); // call the super-constructor
    }


    BasicDayView.prototype = createObject(BasicView.prototype); // define the super-class
    $.extend(BasicDayView.prototype, {

        name: 'basicDay',


        incrementDate: function (date, delta) {
            var out = date.clone().stripTime().add(delta, 'days');
            out = this.skipHiddenDays(out, delta < 0 ? -1 : 1);
            return out;
        },


        render: function (date) {

            this.start = this.intervalStart = date.clone().stripTime();
            this.end = this.intervalEnd = this.start.clone().add(1, 'days');

            this.title = this.calendar.formatDate(this.start, this.opt('titleFormat'));

            BasicView.prototype.render.call(this, 1, 1, false); // call the super-method
        }

    });
    ; ;

    /* An abstract class for all agenda-related views. Displays one more columns with time slots running vertically.
    ----------------------------------------------------------------------------------------------------------------------*/
    // Is a manager for the TimeGrid subcomponent and possibly the DayGrid subcomponent (if allDaySlot is on).
    // Responsible for managing width/height.

    setDefaults({
        allDaySlot: true,
        allDayText: 'all-day',

        scrollTime: '06:00:00',

        slotDuration: '00:30:00',

        axisFormat: generateAgendaAxisFormat,
        timeFormat: {
            agenda: generateAgendaTimeFormat
        },

        minTime: '00:00:00',
        maxTime: '24:00:00',
        slotEventOverlap: true
    });

    var AGENDA_ALL_DAY_EVENT_LIMIT = 5;


    function generateAgendaAxisFormat(options, langData) {
        return langData.longDateFormat('LT')
		.replace(':mm', '(:mm)')
		.replace(/(\Wmm)$/, '($1)') // like above, but for foreign langs
		.replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
    }


    function generateAgendaTimeFormat(options, langData) {
        return langData.longDateFormat('LT')
		.replace(/\s*a$/i, ''); // remove trailing AM/PM
    }


    function AgendaView(calendar) {
        View.call(this, calendar); // call the super-constructor

        this.timeGrid = new TimeGrid(this);

        if (this.opt('allDaySlot')) { // should we display the "all-day" area?
            this.dayGrid = new DayGrid(this); // the all-day subcomponent of this view

            // the coordinate grid will be a combination of both subcomponents' grids
            this.coordMap = new ComboCoordMap([
			this.dayGrid.coordMap,
			this.timeGrid.coordMap
		]);
        }
        else {
            this.coordMap = this.timeGrid.coordMap;
        }
    }


    AgendaView.prototype = createObject(View.prototype); // define the super-class
    $.extend(AgendaView.prototype, {

        timeGrid: null, // the main time-grid subcomponent of this view
        dayGrid: null, // the "all-day" subcomponent. if all-day is turned off, this will be null

        axisWidth: null, // the width of the time axis running down the side

        noScrollRowEls: null, // set of fake row elements that must compensate when scrollerEl has scrollbars

        // when the time-grid isn't tall enough to occupy the given height, we render an <hr> underneath
        bottomRuleEl: null,
        bottomRuleHeight: null,


        /* Rendering
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders the view into `this.el`, which has already been assigned.
        // `colCnt` has been calculated by a subclass and passed here.
        render: function (colCnt) {

            // needed for cell-to-date and date-to-cell calculations in View
            this.rowCnt = 1;
            this.colCnt = colCnt;

            this.el.addClass('fc-agenda-view').html(this.renderHtml());

            // the element that wraps the time-grid that will probably scroll
            this.scrollerEl = this.el.find('.fc-time-grid-container');
            this.timeGrid.coordMap.containerEl = this.scrollerEl; // don't accept clicks/etc outside of this

            this.timeGrid.el = this.el.find('.fc-time-grid');
            this.timeGrid.render();

            // the <hr> that sometimes displays under the time-grid
            this.bottomRuleEl = $('<hr class="' + this.widgetHeaderClass + '"/>')
			.appendTo(this.timeGrid.el); // inject it into the time-grid

            if (this.dayGrid) {
                this.dayGrid.el = this.el.find('.fc-day-grid');
                this.dayGrid.render();

                // have the day-grid extend it's coordinate area over the <hr> dividing the two grids
                this.dayGrid.bottomCoordPadding = this.dayGrid.el.next('hr').outerHeight();
            }

            this.noScrollRowEls = this.el.find('.fc-row:not(.fc-scroller *)'); // fake rows not within the scroller

            View.prototype.render.call(this); // call the super-method

            this.resetScroll(); // do this after sizes have been set
        },


        // Make subcomponents ready for cleanup
        destroy: function () {
            this.timeGrid.destroy();
            if (this.dayGrid) {
                this.dayGrid.destroy();
            }
            View.prototype.destroy.call(this); // call the super-method
        },


        // Builds the HTML skeleton for the view.
        // The day-grid and time-grid components will render inside containers defined by this HTML.
        renderHtml: function () {
            return '' +
			'<table>' +
				'<thead>' +
					'<tr>' +
						'<td class="' + this.widgetHeaderClass + '">' +
							this.timeGrid.headHtml() + // render the day-of-week headers
						'</td>' +
					'</tr>' +
				'</thead>' +
				'<tbody>' +
					'<tr>' +
						'<td class="' + this.widgetContentClass + '">' +
							(this.dayGrid ?
								'<div class="fc-day-grid"/>' +
								'<hr class="' + this.widgetHeaderClass + '"/>' :
								''
								) +
							'<div class="fc-time-grid-container">' +
								'<div class="fc-time-grid"/>' +
							'</div>' +
						'</td>' +
					'</tr>' +
				'</tbody>' +
			'</table>';
        },


        // Generates the HTML that will go before the day-of week header cells.
        // Queried by the TimeGrid subcomponent when generating rows. Ordering depends on isRTL.
        headIntroHtml: function () {
            var date;
            var weekNumber;
            var weekTitle;
            var weekText;

            if (this.opt('weekNumbers')) {
                date = this.cellToDate(0, 0);
                weekNumber = this.calendar.calculateWeekNumber(date);
                weekTitle = this.opt('weekNumberTitle');

                if (this.opt('isRTL')) {
                    weekText = weekNumber + weekTitle;
                }
                else {
                    weekText = weekTitle + weekNumber;
                }

                return '' +
				'<th class="fc-axis fc-week-number ' + this.widgetHeaderClass + '" ' + this.axisStyleAttr() + '>' +
					'<span>' + // needed for matchCellWidths
						htmlEscape(weekText) +
					'</span>' +
				'</th>';
            }
            else {
                return '<th class="fc-axis ' + this.widgetHeaderClass + '" ' + this.axisStyleAttr() + '></th>';
            }
        },


        // Generates the HTML that goes before the all-day cells.
        // Queried by the DayGrid subcomponent when generating rows. Ordering depends on isRTL.
        dayIntroHtml: function () {
            return '' +
			'<td class="fc-axis ' + this.widgetContentClass + '" ' + this.axisStyleAttr() + '>' +
				'<span>' + // needed for matchCellWidths
					(this.opt('allDayHtml') || htmlEscape(this.opt('allDayText'))) +
				'</span>' +
			'</td>';
        },


        // Generates the HTML that goes before the bg of the TimeGrid slot area. Long vertical column.
        slotBgIntroHtml: function () {
            return '<td class="fc-axis ' + this.widgetContentClass + '" ' + this.axisStyleAttr() + '></td>';
        },


        // Generates the HTML that goes before all other types of cells.
        // Affects content-skeleton, helper-skeleton, highlight-skeleton for both the time-grid and day-grid.
        // Queried by the TimeGrid and DayGrid subcomponents when generating rows. Ordering depends on isRTL.
        introHtml: function () {
            return '<td class="fc-axis" ' + this.axisStyleAttr() + '></td>';
        },


        // Generates an HTML attribute string for setting the width of the axis, if it is known
        axisStyleAttr: function () {
            if (this.axisWidth !== null) {
                return 'style="width:' + this.axisWidth + 'px"';
            }
            return '';
        },


        /* Dimensions
        ------------------------------------------------------------------------------------------------------------------*/

        updateSize: function (isResize) {
            if (isResize) {
                this.timeGrid.resize();
            }
            View.prototype.updateSize.call(this, isResize);
        },


        // Refreshes the horizontal dimensions of the view
        updateWidth: function () {
            // make all axis cells line up, and record the width so newly created axis cells will have it
            this.axisWidth = matchCellWidths(this.el.find('.fc-axis'));
        },


        // Adjusts the vertical dimensions of the view to the specified values
        setHeight: function (totalHeight, isAuto) {
            var eventLimit;
            var scrollerHeight;

            if (this.bottomRuleHeight === null) {
                // calculate the height of the rule the very first time
                this.bottomRuleHeight = this.bottomRuleEl.outerHeight();
            }
            this.bottomRuleEl.hide(); // .show() will be called later if this <hr> is necessary

            // reset all dimensions back to the original state
            this.scrollerEl.css('overflow', '');
            unsetScroller(this.scrollerEl);
            uncompensateScroll(this.noScrollRowEls);

            // limit number of events in the all-day area
            if (this.dayGrid) {
                this.dayGrid.destroySegPopover(); // kill the "more" popover if displayed

                eventLimit = this.opt('eventLimit');
                if (eventLimit && typeof eventLimit !== 'number') {
                    eventLimit = AGENDA_ALL_DAY_EVENT_LIMIT; // make sure "auto" goes to a real number
                }
                if (eventLimit) {
                    this.dayGrid.limitRows(eventLimit);
                }
            }

            if (!isAuto) { // should we force dimensions of the scroll container, or let the contents be natural height?

                scrollerHeight = this.computeScrollerHeight(totalHeight);
                if (setPotentialScroller(this.scrollerEl, scrollerHeight)) { // using scrollbars?

                    // make the all-day and header rows lines up
                    compensateScroll(this.noScrollRowEls, getScrollbarWidths(this.scrollerEl));

                    // the scrollbar compensation might have changed text flow, which might affect height, so recalculate
                    // and reapply the desired height to the scroller.
                    scrollerHeight = this.computeScrollerHeight(totalHeight);
                    this.scrollerEl.height(scrollerHeight);

                    this.restoreScroll();
                }
                else { // no scrollbars
                    // still, force a height and display the bottom rule (marks the end of day)
                    this.scrollerEl.height(scrollerHeight).css('overflow', 'hidden'); // in case <hr> goes outside
                    this.bottomRuleEl.show();
                }
            }
        },


        // Sets the scroll value of the scroller to the intial pre-configured state prior to allowing the user to change it.
        resetScroll: function () {
            var _this = this;
            var scrollTime = moment.duration(this.opt('scrollTime'));
            var top = this.timeGrid.computeTimeTop(scrollTime);

            // zoom can give weird floating-point values. rather scroll a little bit further
            top = Math.ceil(top);

            if (top) {
                top++; // to overcome top border that slots beyond the first have. looks better
            }

            function scroll() {
                _this.scrollerEl.scrollTop(top);
            }

            scroll();
            setTimeout(scroll, 0); // overrides any previous scroll state made by the browser
        },


        /* Events
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders events onto the view and populates the View's segment array
        renderEvents: function (events) {
            var dayEvents = [];
            var timedEvents = [];
            var daySegs = [];
            var timedSegs;
            var i;

            // separate the events into all-day and timed
            for (i = 0; i < events.length; i++) {
                if (events[i].allDay) {
                    dayEvents.push(events[i]);
                }
                else {
                    timedEvents.push(events[i]);
                }
            }

            // render the events in the subcomponents
            timedSegs = this.timeGrid.renderEvents(timedEvents);
            if (this.dayGrid) {
                daySegs = this.dayGrid.renderEvents(dayEvents);
            }

            // the all-day area is flexible and might have a lot of events, so shift the height
            this.updateHeight();

            View.prototype.renderEvents.call(this, events); // call the super-method
        },


        // Retrieves all segment objects that are rendered in the view
        getSegs: function () {
            return this.timeGrid.getSegs().concat(
			this.dayGrid ? this.dayGrid.getSegs() : []
		);
        },


        // Unrenders all event elements and clears internal segment data
        destroyEvents: function () {
            View.prototype.destroyEvents.call(this); // do this before the grids' segs have been cleared

            // if destroyEvents is being called as part of an event rerender, renderEvents will be called shortly
            // after, so remember what the scroll value was so we can restore it.
            this.recordScroll();

            // destroy the events in the subcomponents
            this.timeGrid.destroyEvents();
            if (this.dayGrid) {
                this.dayGrid.destroyEvents();
            }

            // we DON'T need to call updateHeight() because:
            // A) a renderEvents() call always happens after this, which will eventually call updateHeight()
            // B) in IE8, this causes a flash whenever events are rerendered
        },


        /* Event Dragging
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of an event being dragged over the view.
        // A returned value of `true` signals that a mock "helper" event has been rendered.
        renderDrag: function (start, end, seg) {
            if (start.hasTime()) {
                return this.timeGrid.renderDrag(start, end, seg);
            }
            else if (this.dayGrid) {
                return this.dayGrid.renderDrag(start, end, seg);
            }
        },


        // Unrenders a visual indications of an event being dragged over the view
        destroyDrag: function () {
            this.timeGrid.destroyDrag();
            if (this.dayGrid) {
                this.dayGrid.destroyDrag();
            }
        },


        /* Selection
        ------------------------------------------------------------------------------------------------------------------*/


        // Renders a visual indication of a selection
        renderSelection: function (start, end) {
            if (start.hasTime() || end.hasTime()) {
                this.timeGrid.renderSelection(start, end);
            }
            else if (this.dayGrid) {
                this.dayGrid.renderSelection(start, end);
            }
        },


        // Unrenders a visual indications of a selection
        destroySelection: function () {
            this.timeGrid.destroySelection();
            if (this.dayGrid) {
                this.dayGrid.destroySelection();
            }
        }

    });

    ; ;

    /* A week view with an all-day cell area at the top, and a time grid below
    ----------------------------------------------------------------------------------------------------------------------*/
    // TODO: a WeekView mixin for calculating dates and titles

    fcViews.agendaWeek = AgendaWeekView; // register the view

    function AgendaWeekView(calendar) {
        AgendaView.call(this, calendar); // call the super-constructor
    }


    AgendaWeekView.prototype = createObject(AgendaView.prototype); // define the super-class
    $.extend(AgendaWeekView.prototype, {

        name: 'agendaWeek',


        incrementDate: function (date, delta) {
            return date.clone().stripTime().add(delta, 'weeks').startOf('week');
        },


        render: function (date) {

            this.intervalStart = date.clone().stripTime().startOf('week');
            this.intervalEnd = this.intervalStart.clone().add(1, 'weeks');

            this.start = this.skipHiddenDays(this.intervalStart);
            this.end = this.skipHiddenDays(this.intervalEnd, -1, true);

            this.title = this.calendar.formatRange(
			this.start,
			this.end.clone().subtract(1), // make inclusive by subtracting 1 ms
			this.opt('titleFormat'),
			' \u2014 ' // emphasized dash
		);

            AgendaView.prototype.render.call(this, this.getCellsPerWeek()); // call the super-method
        }

    });

    ; ;

    /* A day view with an all-day cell area at the top, and a time grid below
    ----------------------------------------------------------------------------------------------------------------------*/

    fcViews.agendaDay = AgendaDayView; // register the view

    function AgendaDayView(calendar) {
        AgendaView.call(this, calendar); // call the super-constructor
    }


    AgendaDayView.prototype = createObject(AgendaView.prototype); // define the super-class
    $.extend(AgendaDayView.prototype, {

        name: 'agendaDay',


        incrementDate: function (date, delta) {
            var out = date.clone().stripTime().add(delta, 'days');
            out = this.skipHiddenDays(out, delta < 0 ? -1 : 1);
            return out;
        },


        render: function (date) {

            this.start = this.intervalStart = date.clone().stripTime();
            this.end = this.intervalEnd = this.start.clone().add(1, 'days');

            this.title = this.calendar.formatDate(this.start, this.opt('titleFormat'));

            AgendaView.prototype.render.call(this, 1); // call the super-method
        }

    });

